diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/README.rst b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/README.rst
new file mode 100644
index 000000000..4a044b431
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/README.rst
@@ -0,0 +1,65 @@
+=======================================================
+AEAT SII - Special Prorate Regularization Capital Asset
+=======================================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:99123384c24c2b73dc236e771222caff831de4cec8cc8cb9a81ff1e0a04564a1
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-NuoBiT%2Fodoo--addons-lightgray.png?logo=github
+    :target: https://github.com/NuoBiT/odoo-addons/tree/18.0/l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+    :alt: NuoBiT/odoo-addons
+
+|badge1| |badge2| |badge3|
+
+This module allows send to SII automaticaly the capital assets prorate
+regularization.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/NuoBiT/odoo-addons/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/NuoBiT/odoo-addons/issues/new?body=module:%20l10n_es_aeat_sii_special_prorate_regularization_capital_asset%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* NuoBiT Solutions SL
+
+Contributors
+------------
+
+- `NuoBiT <https://www.nuobit.com>`__:
+
+  - Kilian Niubo kniubo@nuobit.com
+  - Eric Antones eantones@nuobit.com
+  - Deniz Gallo dgallo@nuobit.com
+
+Maintainers
+-----------
+
+This module is part of the `NuoBiT/odoo-addons <https://github.com/NuoBiT/odoo-addons/tree/18.0/l10n_es_aeat_sii_special_prorate_regularization_capital_asset>`_ project on GitHub.
+
+You are welcome to contribute.
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/__init__.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/__init__.py
new file mode 100644
index 000000000..0650744f6
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/__manifest__.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/__manifest__.py
new file mode 100644
index 000000000..7ae675142
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/__manifest__.py
@@ -0,0 +1,26 @@
+# Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+# Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
+
+{
+    "name": "AEAT SII - Special Prorate Regularization Capital Asset",
+    "summary": "This module allows send to SII automaticaly the "
+    "capital assets prorate regularization.",
+    "version": "18.0.1.0.1",
+    "category": "Accounting",
+    "author": "NuoBiT Solutions SL",
+    "website": "https://github.com/NuoBiT/odoo-addons",
+    "license": "AGPL-3",
+    "depends": [
+        "l10n_es_aeat_mod303_special_prorate_regularization_capital_asset",
+        "l10n_es_aeat_sii_oca_extension",
+        "queue_job",
+    ],
+    "data": [
+        "data/aeat_sii_queue_job.xml",
+        "views/account_asset.xml",
+        "views/mod303_views.xml",
+        "views/capital_asset_prorate_regularization.xml",
+        "views/res_company_view.xml",
+    ],
+}
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/data/aeat_sii_queue_job.xml b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/data/aeat_sii_queue_job.xml
new file mode 100644
index 000000000..11cf09b5a
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/data/aeat_sii_queue_job.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<odoo>
+    <record id="capital_asset_validate_sii" model="queue.job.channel">
+        <field name="name">root.capital_asset_validate_sii</field>
+        <field name="parent_id" ref="queue_job.channel_root" />
+    </record>
+    <record
+        id="job_function_confirm_one_capital_asset_prorate_line"
+        model="queue.job.function"
+    >
+        <field
+            name="model_id"
+            ref="l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_capital_asset_prorate_regularization"
+        />
+        <field name="method">confirm_one_capital_asset_prorate_line</field>
+        <field name="channel_id" ref="capital_asset_validate_sii" />
+    </record>
+    <record
+        id="job_function_cancel_one_capital_asset_prorate_line"
+        model="queue.job.function"
+    >
+        <field
+            name="model_id"
+            ref="l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_capital_asset_prorate_regularization"
+        />
+        <field name="method">cancel_one_capital_asset_prorate_line</field>
+        <field name="channel_id" ref="capital_asset_validate_sii" />
+    </record>
+</odoo>
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/i18n/es.po b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/i18n/es.po
new file mode 100644
index 000000000..ac2a8b63f
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/i18n/es.po
@@ -0,0 +1,364 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 18.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2022-11-21 14:30+0000\n"
+"PO-Revision-Date: 2026-03-05 10:41+0000\n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_l10n_es_aeat_mod303_report
+msgid "AEAT 303 Report"
+msgstr "Modelo 303"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_send_error
+msgid "AEAT Send Error"
+msgstr "Error de envío AEAT"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_content_sent
+msgid "AEAT last content sent"
+msgstr "Último contenido enviado AEAT"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_header_sent
+msgid "AEAT last header sent"
+msgstr "Última cabecera enviada AEAT"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_send_failed
+msgid "AEAT send failed"
+msgstr "Envío AEAT fallido"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_state
+msgid "AEAT send state"
+msgstr ""
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__capital_asset_prorate_regularization__aeat_state__sent_w_errors
+msgid "Accepted with errors"
+msgstr "Aceptado con errores"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_aeat_tax_agency
+msgid "Aeat Tax Agency"
+msgstr "Agencia Tributaria AEAT"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_account_asset
+msgid "Asset"
+msgstr "Activo"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__res_company__capital_asset_send_mode__fixed
+msgid "At fixed time"
+msgstr "A una hora fija"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.view_l10n_es_aeat_mod303_report_form
+msgid "Cancel capital assets prorate regularization SII"
+msgstr ""
+"Cancelar la regularización de la prorata de los bienes de inversion del SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.view_l10n_es_aeat_mod303_report_form
+msgid "Cancel field 43 to SII"
+msgstr "Cancelación casilla 43 al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__capital_asset_prorate_regularization__aeat_state__cancelled
+msgid "Cancelled"
+msgstr "Cancelado"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__capital_asset_prorate_regularization__aeat_state__cancelled_modified
+msgid "Cancelled in SII but last modifications not sent"
+msgstr "Cancelado en SII pero las ultimas modificaciones no han sido enviadas"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_capital_asset_prorate_regularization
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.capital_asset_prorate_regularization_view_form
+msgid "Capital Asset Prorate Regularization"
+msgstr "Regularizacion de la prorata de los bienes de inversión"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.view_company_capital_asset_sii_form
+msgid "Capital Asset connector config"
+msgstr "Conector configuración - Bienes de inversión"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,help:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_res_company__capital_asset_use_connector
+msgid ""
+"Check it to use connector instead of sending the invoice directly when it's "
+"validated"
+msgstr ""
+"Márquelo para usar el conector en lugar de enviar la factura directamente "
+"cuando se valida"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.model_res_company
+msgid "Companies"
+msgstr "Compañías"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__asset_prorate_line_job_ids
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.capital_asset_prorate_regularization_view_form
+msgid "Connector Jobs"
+msgstr "Trabajos del conector"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_res_company__capital_asset_delay_time
+msgid "Delay time"
+msgstr "Tiempo de retardo"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__sii_enabled
+msgid "Enable SII"
+msgstr "Activar SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/mod303.py:0
+msgid ""
+"Exist prorate lines in year: %(year)s in assets %(assets)s with capital "
+"asset prorate lines. Please send the cancellation to the sii before "
+"canceling the 303 model."
+msgstr ""
+"Existen líneas de prorata en el año: %(year)s en los activos %(assets)s con "
+"líneas de prorata de bienes de inversión. Por favor, envíe la cancelación al "
+"SII antes de cancelar el modelo 303."
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.capital_asset_prorate_regularization_view_form
+msgid "General"
+msgstr "General"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,help:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_send_failed
+msgid ""
+"Indicates that the last attempt to communicate this document to the SII has "
+"failed. See SII return for details"
+msgstr ""
+"Indica que el último intento de comunicar la factura al SII ha fallado. Ver "
+"el retorno SII para más detalles"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,help:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__sii_account_registration_date
+msgid ""
+"Indicates the account registration date set at the SII, which must be the "
+"date when the invoice is recorded in the system and is independent of the "
+"date of the accounting entry of the invoice"
+msgstr ""
+"Indica la fecha de registro contable establecida en el SII, la cual debe ser"
+" la fecha en que se registra la factura en el sistema con independencia de "
+"la fecha del asiento contable de la factura"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,help:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__aeat_state
+msgid ""
+"Indicates the state of this document in relation with the presentation at "
+"the AEAT"
+msgstr "Indica el estado de este documento en relación con la presentación en la AEAT"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid "No VAT configured for the company '{}'"
+msgstr "No hay un IVA configurado para la compañía '{}'"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__capital_asset_prorate_regularization__aeat_state__not_sent
+msgid "Not sent"
+msgstr "No registrada"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__res_company__capital_asset_send_mode__auto
+msgid "On validate"
+msgstr "Al validar"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/mod303.py:0
+msgid ""
+"Please, post capital asset prorate move of the 303 model before send capital"
+" asset prorate regularization to SII"
+msgstr "Por favor, contabilice el asiento de la prorata de los bienes de inversión del "
+"modelo 303 antes de enviar la regularización de la prorata de los bienes de inversión al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid ""
+"Please, post capital asset prorate regularization move before send capital "
+"asset prorate regularization to SII"
+msgstr "Por favor, contabilice el asiento de regularización de la prorata de los bienes "
+"de inversión antes de enviar la regularización de la prorata de los bienes de inversión al SII"
+
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_l10n_es_aeat_mod303_report__prorate_asset_lines_to_cancel
+msgid "Prorate Asset Lines To Cancel"
+msgstr "Lineas de prorata de activo para cancelar"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_l10n_es_aeat_mod303_report__prorate_asset_lines_to_send
+msgid "Prorate Asset Lines To Send"
+msgstr "Lineas de prorata de activo para enviar"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__capital_asset_prorate_regularization__aeat_state__sent_modified
+msgid "Registered in SII but last modifications not sent"
+msgstr "Registro correcto en SII con modificaciones pendientes de comunicar"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__sii_csv
+msgid "SII CSV"
+msgstr "CSV SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_search
+msgid "SII Cancelled"
+msgstr "SII cancelado"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.capital_asset_prorate_regularization_view_form
+msgid "SII Information"
+msgstr "Información SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.capital_asset_prorate_regularization_view_form
+msgid "SII Result"
+msgstr "Resultado SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__sii_return
+msgid "SII Return"
+msgstr "Retorno SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_account_asset__sii_send_errors
+msgid "SII Send Errors"
+msgstr "Errores de envío al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_search
+msgid "SII Sent"
+msgstr "SII enviado"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_capital_asset_prorate_regularization__sii_account_registration_date
+msgid "SII account registration date"
+msgstr "Fecha de registro contable SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_search
+msgid "SII error"
+msgstr "Error SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_search
+msgid "SII not sent"
+msgstr "SII no enviado"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_search
+msgid "SII sent with errors"
+msgstr "SII enviado con errores"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_form
+msgid "Send asset to SII"
+msgstr "Enviar activo al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.account_asset_view_form
+msgid "Send cancellation to SII"
+msgstr "Enviar anulación al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.view_l10n_es_aeat_mod303_report_form
+msgid "Send capital assets prorate regularization to SII"
+msgstr ""
+"Enviar regularización de la prorrata de los bienes de inversion al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.view_l10n_es_aeat_mod303_report_form
+msgid "Send field 43 to SII"
+msgstr "Enviar casilla 43 al SII"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_res_company__capital_asset_send_mode
+msgid "Send mode"
+msgstr "Modo de envío"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__capital_asset_prorate_regularization__aeat_state__sent
+msgid "Sent"
+msgstr "Enviada"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_res_company__capital_asset_sent_time
+msgid "Sent time"
+msgstr "Hora de envío"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model_terms:ir.ui.view,arch_db:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.capital_asset_prorate_regularization_view_form
+msgid "Technical"
+msgstr "Técnica"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid ""
+"The fiscal position of the partner and of the invoice is different. Please "
+"review asset: %(asset_id)i %(asset_name)s"
+msgstr "La posición fiscal del cliente y de la factura es diferente."
+"Por favor revise el activo: %(asset_id)i %(asset_name)s"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid "The partner has not a VAT configured."
+msgstr "El cliente no tiene un IVA configurado."
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid "This company doesn't have SII enabled."
+msgstr "Esta compañía no tiene el SII activado."
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields,field_description:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.field_res_company__capital_asset_use_connector
+msgid "Use connector"
+msgstr "Usar conector"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#: model:ir.model.fields.selection,name:l10n_es_aeat_sii_special_prorate_regularization_capital_asset.selection__res_company__capital_asset_send_mode__delayed
+msgid "With delay"
+msgstr "Con retardo"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid ""
+"You can't delete a capital asset prorate regularization line if it has been "
+"previously sent"
+msgstr "No se puede eliminar una línea de regularización de la prorata de los "
+"bienes de inversión si ha sido enviada previamente"
+
+#. module: l10n_es_aeat_sii_special_prorate_regularization_capital_asset
+#. odoo-python
+#: code:addons/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py:0
+msgid "You have to select what account chart template use this company."
+msgstr "Debe seleccionar qué plantilla de plan contable utiliza esta compañía."
\ No newline at end of file
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/migrations/18.0.1.0.1/pre-migrate.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/migrations/18.0.1.0.1/pre-migrate.py
new file mode 100644
index 000000000..bc745cc1a
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/migrations/18.0.1.0.1/pre-migrate.py
@@ -0,0 +1,22 @@
+# Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
+
+from openupgradelib import openupgrade
+
+from odoo.tools.sql import column_exists
+
+_column_renames = {
+    "capital_asset_prorate_regularization": [
+        ("sii_state", "aeat_state"),
+        ("sii_header_sent", "aeat_header_sent"),
+        ("sii_content_sent", "aeat_content_sent"),
+        ("sii_send_error", "aeat_send_error"),
+        ("sii_send_failed", "aeat_send_failed"),
+    ],
+}
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    if column_exists(env.cr, "capital_asset_prorate_regularization", "sii_state"):
+        openupgrade.rename_columns(env.cr, _column_renames)
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/__init__.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/__init__.py
new file mode 100644
index 000000000..bf3f241ec
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/__init__.py
@@ -0,0 +1,5 @@
+from . import account_asset
+from . import aeat_tax_agency
+from . import mod303
+from . import capital_asset_prorate_regularization
+from . import res_company
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/account_asset.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/account_asset.py
new file mode 100644
index 000000000..3cf59553a
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/account_asset.py
@@ -0,0 +1,31 @@
+# Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+# Copyright NuoBiT Solutions SL - Eric Antones <eantones@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models
+
+
+class AccountAsset(models.Model):
+    _inherit = "account.asset"
+
+    sii_send_errors = fields.Char(
+        string="SII Send Errors",
+        compute="_compute_sii_send_errors",
+        store=True,
+        readonly=True,
+    )
+
+    @api.depends(
+        "capital_asset_prorate_regularization_ids",
+        "capital_asset_prorate_regularization_ids.aeat_send_error",
+    )
+    def _compute_sii_send_errors(self):
+        for rec in self:
+            if rec.capital_asset_prorate_regularization_ids:
+                rec.sii_send_errors = ", ".join(
+                    sorted(
+                        rec.capital_asset_prorate_regularization_ids.filtered(
+                            "aeat_send_error"
+                        ).mapped("aeat_send_error")
+                    )
+                )
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/aeat_tax_agency.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/aeat_tax_agency.py
new file mode 100644
index 000000000..4462e08a6
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/aeat_tax_agency.py
@@ -0,0 +1,18 @@
+# Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+# Copyright NuoBiT Solutions SL - Eric Antones <eantones@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class AeatTaxAgency(models.Model):
+    _inherit = "aeat.tax.agency"
+
+    def _prepare_sii_wdsl_mapping(self):
+        return {**super()._prepare_sii_wdsl_mapping(), "capital_asset": "sii_wsdl_pi"}
+
+    def _prepare_sii_port_name_mapping(self):
+        return {
+            **super()._prepare_sii_port_name_mapping(),
+            "capital_asset": "SuministroBienesInversion",
+        }
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py
new file mode 100644
index 000000000..ad243b20a
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/capital_asset_prorate_regularization.py
@@ -0,0 +1,545 @@
+# Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+# Copyright NuoBiT Solutions SL - Eric Antones <eantones@nuobit.com>
+# Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
+
+import json
+import logging
+
+from requests import Session
+
+from odoo import _, api, exceptions, fields, models
+from odoo.exceptions import ValidationError
+from odoo.modules.registry import Registry
+
+from odoo.addons.l10n_es_aeat.models.aeat_mixin import AEAT_STATES, round_by_keys
+from odoo.addons.l10n_es_aeat_sii_oca.models.sii_mixin import SII_STATES, SII_VERSION
+
+_logger = logging.getLogger(__name__)
+try:
+    from zeep import Client
+    from zeep.plugins import HistoryPlugin
+    from zeep.transports import Transport
+except (OSError, ImportError) as err:
+    _logger.debug(err)
+
+try:
+    pass
+except ImportError:
+    _logger.debug("Can not `import queue_job`.")
+
+
+class AssetProrateRegularization(models.Model):
+    _inherit = "capital.asset.prorate.regularization"
+
+    aeat_state = fields.Selection(
+        selection=AEAT_STATES + SII_STATES,
+        string="AEAT send state",
+        default="not_sent",
+        readonly=True,
+        copy=False,
+        help="Indicates the state of this document in relation with the "
+        "presentation at the AEAT",
+    )
+    sii_csv = fields.Char(
+        string="SII CSV",
+        copy=False,
+        readonly=True,
+    )
+    sii_return = fields.Text(
+        string="SII Return",
+        copy=False,
+        readonly=True,
+    )
+    aeat_header_sent = fields.Text(
+        string="AEAT last header sent",
+        copy=False,
+        readonly=True,
+    )
+    aeat_content_sent = fields.Text(
+        string="AEAT last content sent",
+        copy=False,
+        readonly=True,
+    )
+    aeat_send_error = fields.Text(
+        string="AEAT Send Error",
+        copy=False,
+        readonly=True,
+    )
+    aeat_send_failed = fields.Boolean(
+        string="AEAT send failed",
+        copy=False,
+        help="Indicates that the last attempt to communicate this document to "
+        "the SII has failed. See SII return for details",
+    )
+
+    sii_account_registration_date = fields.Date(
+        string="SII account registration date",
+        readonly=True,
+        copy=False,
+        help="Indicates the account registration date set at the SII, which "
+        "must be the date when the invoice is recorded in the system and "
+        "is independent of the date of the accounting entry of the "
+        "invoice",
+    )
+    asset_prorate_line_job_ids = fields.Many2many(
+        comodel_name="queue.job",
+        column1="asset_prorate_line_id",
+        column2="job_id",
+        # TODO: remove this comment.Nom relation Massa llarg?
+        relation="capital_asset_prorate_regularization_queue_job_rel",
+        string="Connector Jobs",
+        copy=False,
+    )
+    sii_enabled = fields.Boolean(string="Enable SII", compute="_compute_sii_enabled")
+
+    def _compute_sii_enabled(self):
+        """Compute if the asset is enabled for the SII"""
+        for line in self:
+            if line.asset_id.company_id.sii_enabled:
+                asset_invoice = self.asset_id.invoice_move_line_id.move_id
+                self.sii_enabled = (
+                    asset_invoice.fiscal_position_id
+                    and asset_invoice.fiscal_position_id.sii_active
+                ) or not asset_invoice.fiscal_position_id
+            else:
+                self.sii_enabled = False
+
+    def _get_account_registration_date(self):
+        """Hook method to allow the setting of the account registration date
+        of each supplier invoice. The SII recommends to set the send date as
+        the default value (point 9.3 of the document
+        SII_Descripcion_ServicioWeb_v0.7.pdf), so by default we return
+        the current date or, if exists, the stored
+        sii_account_registration_date
+        :return String date in the format %Y-%m-%d"""
+        self.ensure_one()
+        return self.sii_account_registration_date or fields.Date.today()
+
+    def confirm_one_capital_asset_prorate_line(self):
+        self.sudo()._send_asset_to_sii()
+
+    def cancel_one_capital_asset_prorate_line(self):
+        self.sudo()._cancel_asset_to_sii()
+
+    def _process_asset_for_sii_send(self):
+        """Process documents for sending to the SII. Adds general checks from
+        configuration parameters and document availability for SII. If the
+        document is to be sent the decides the send method: direct send or
+        via connector depending on 'Use connector' configuration"""
+        # TODO: descomentar
+        queue_obj = self.env["queue.job"].sudo()
+        for asset_line in self:
+            company = asset_line.asset_id.company_id
+            if not company.capital_asset_use_connector:
+                asset_line._send_asset_to_sii()
+            # TODO:descomentar cuando esten los jobs
+            else:
+                eta = company._get_sii_eta_capital_assets()
+                new_delay = (
+                    asset_line.sudo()
+                    .with_context(company_id=company.id)
+                    .with_delay(eta=eta if not asset_line.aeat_send_failed else False)
+                    .confirm_one_capital_asset_prorate_line()
+                )
+                job = queue_obj.search([("uuid", "=", new_delay.uuid)], limit=1)
+                asset_line.sudo().asset_prorate_line_job_ids |= job
+
+    def send_asset_sii(self):
+        if (
+            self.mod303_id
+            and self.mod303_id.move_prorate_capital_asset_id.state == "draft"
+            or (self.mod303_id and not self.mod303_id.move_prorate_capital_asset_id)
+        ):
+            raise ValidationError(
+                _(
+                    "Please, post capital asset prorate"
+                    " regularization move before send "
+                    "capital asset prorate regularization to SII"
+                )
+            )
+        if not self._cancel_asset_jobs():
+            self._process_asset_for_sii_send()
+
+    def _send_asset_to_sii(self):
+        serv = self._connect_aeat("capital_asset")
+        if self.aeat_state == "not_sent":
+            tipo_comunicacion = "A0"
+        else:
+            tipo_comunicacion = "A1"
+        header = self._get_aeat_header(tipo_comunicacion)
+        asset_line_vals = {
+            "aeat_header_sent": json.dumps(header, indent=4),
+        }
+        try:
+            asset_dict = self._get_sii_asset_dict()
+            asset_line_vals["aeat_content_sent"] = json.dumps(asset_dict, indent=4)
+            res = serv.SuministroLRBienesInversion(header, asset_dict)
+            res_line = res["RespuestaLinea"][0]
+            if res["EstadoEnvio"] == "Correcto":
+                asset_line_vals.update(
+                    {
+                        "aeat_state": "sent",
+                        "sii_csv": res["CSV"],
+                        "aeat_send_failed": False,
+                    }
+                )
+            elif (
+                res["EstadoEnvio"] == "ParcialmenteCorrecto"
+                and res_line["EstadoRegistro"] == "AceptadoConErrores"
+            ):
+                asset_line_vals.update(
+                    {
+                        "aeat_state": "sent_w_errors",
+                        "sii_csv": res["CSV"],
+                        "aeat_send_failed": True,
+                    }
+                )
+            else:
+                asset_line_vals["aeat_send_failed"] = True
+            if (
+                "aeat_state" in asset_line_vals
+                and not self.sii_account_registration_date
+            ):
+                asset_line_vals["sii_account_registration_date"] = (
+                    self._get_account_registration_date()
+                )
+            asset_line_vals["sii_return"] = res
+            send_error = False
+            if res_line["CodigoErrorRegistro"]:
+                send_error = "{} | {}".format(
+                    str(res_line["CodigoErrorRegistro"]),
+                    str(res_line["DescripcionErrorRegistro"])[:60],
+                )
+            asset_line_vals["aeat_send_error"] = send_error
+            self.write(asset_line_vals)
+
+        except Exception as fault:
+            new_cr = Registry(self.env.cr.dbname).cursor()
+            env = api.Environment(new_cr, self.env.uid, self.env.context)
+            asset_line = env["capital.asset.prorate.regularization"].browse(self.id)
+            asset_line_vals.update(
+                {
+                    "aeat_send_failed": True,
+                    "aeat_send_error": repr(fault)[:60],
+                    "sii_return": repr(fault),
+                }
+            )
+            asset_line.write(asset_line_vals)
+            new_cr.commit()
+            new_cr.close()
+            raise
+
+    def cancel_asset_sii(self):
+        if not self._cancel_asset_jobs():
+            queue_obj = self.env["queue.job"]
+            for asset_line in self:
+                company = self.asset_id.company_id
+                if not company.capital_asset_use_connector:
+                    self._cancel_asset_to_sii()
+                else:
+                    eta = company._get_sii_eta_capital_assets()
+                    new_delay = (
+                        self.sudo()
+                        .with_context(company_id=company.id)
+                        .with_delay(eta=eta)
+                        .cancel_one_capital_asset_prorate_line()
+                    )
+                    job = queue_obj.search([("uuid", "=", new_delay.uuid)], limit=1)
+                    asset_line.sudo().asset_prorate_line_job_ids |= job
+
+    def _cancel_asset_to_sii(self):
+        serv = self._connect_aeat("capital_asset")
+        header = self._get_aeat_header(cancellation=True)
+        asset_line_vals = {
+            "aeat_send_failed": True,
+            "aeat_send_error": False,
+        }
+        try:
+            asset_dict = self._get_cancel_sii_asset_dict()
+            res = serv.AnulacionLRBienesInversion(header, asset_dict)
+            asset_line_vals["sii_return"] = res
+            if res["EstadoEnvio"] == "Correcto":
+                asset_line_vals.update(
+                    {
+                        "aeat_state": "cancelled",
+                        "sii_csv": res["CSV"],
+                        "aeat_send_failed": False,
+                    }
+                )
+            res_line = res["RespuestaLinea"][0]
+
+            if res_line["CodigoErrorRegistro"]:
+                asset_line_vals["aeat_send_error"] = "{} | {}".format(
+                    str(res_line["CodigoErrorRegistro"]),
+                    str(res_line["DescripcionErrorRegistro"])[:60],
+                )
+            self.write(asset_line_vals)
+        except Exception as fault:
+            new_cr = Registry(self.env.cr.dbname).cursor()
+            env = api.Environment(new_cr, self.env.uid, self.env.context)
+            asset_line = env["capital.asset.prorate.regularization"].browse(self.id)
+            asset_line_vals.update(
+                {
+                    "aeat_send_failed": True,
+                    "aeat_send_error": repr(fault)[:60],
+                    "sii_return": repr(fault),
+                }
+            )
+            asset_line.write(asset_line_vals)
+            new_cr.commit()
+            new_cr.close()
+            raise
+
+    def _get_cancel_sii_asset_dict(self):
+        self.ensure_one()
+        self._aeat_check_exceptions()
+        return self._get_sii_asset_dict(cancel=True)
+
+    def _cancel_asset_jobs(self):
+        job_started = False
+        for queue in self.sudo().mapped("asset_prorate_line_job_ids"):
+            if queue.state == "started":
+                job_started = True
+            elif queue.state in ("pending", "enqueued", "failed"):
+                queue.unlink()
+        return job_started
+
+    def _connect_aeat(self, mapping_key):
+        self.ensure_one()
+        public_crt, private_key = self.env["l10n.es.aeat.certificate"].get_certificates(
+            company=self.asset_id.company_id
+        )
+        params = self._connect_params_aeat(mapping_key)
+        session = Session()
+        session.cert = (public_crt, private_key)
+        transport = Transport(session=session)
+        history = HistoryPlugin()
+        client = Client(wsdl=params["wsdl"], transport=transport, plugins=[history])
+        return self._bind_service(client, params["port_name"], params["address"])
+
+    def _bind_service(self, client, port_name, address=None):
+        self.ensure_one()
+        service = client._get_service("siiService")
+        port = client._get_port(service, port_name)
+        address = address or port.binding_options["address"]
+        return client.create_service(port.binding.name, address)
+
+    def _connect_params_aeat(self, mapping_key):
+        self.ensure_one()
+        agency = self.asset_id.company_id.tax_agency_id
+        if not agency:
+            # We use spanish agency by default to keep old behavior with
+            # ir.config parameters. In the future it might be good to reinforce
+            # to explicitly set a tax agency in the company by raising an error
+            # here.
+            agency = self.env.ref("l10n_es_aeat.aeat_tax_agency_spain")
+        return agency._connect_params_sii(mapping_key, self.asset_id.company_id)
+
+    def _get_aeat_header(self, tipo_comunicacion=False, cancellation=False):
+        """Builds SII send header
+
+        :param tipo_comunicacion String 'A0': new reg, 'A1': modification
+        :param cancellation Bool True when the communication is for document
+            cancellation
+        :return Dict with header data depending on cancellation
+        """
+        self.ensure_one()
+        company = self.asset_id.company_id
+        if not company.vat:
+            raise exceptions.UserError(
+                _("No VAT configured for the company '{}'").format(company.name)
+            )
+        header = {
+            "IDVersionSii": SII_VERSION,
+            "Titular": {
+                "NombreRazon": self.asset_id.company_id.name[0:120],
+                "NIF": self.asset_id.company_id.vat[2:],
+            },
+        }
+        if not cancellation:
+            header.update({"TipoComunicacion": tipo_comunicacion})
+        return header
+
+    def _get_sii_identifier(self):
+        """Get the SII structure for a partner identifier depending on the
+        conditions of the document.
+        """
+        self.ensure_one()
+        gen_type = self._get_sii_gen_type()
+        (
+            country_code,
+            identifier_type,
+            identifier,
+        ) = self._aeat_get_partner()._parse_aeat_vat_info()
+        # Limpiar alfanum
+        if identifier:
+            identifier = "".join(e for e in identifier if e.isalnum()).upper()
+        else:
+            identifier = "NO_DISPONIBLE"
+            identifier_type = "06"
+        if gen_type == 1:
+            if "1117" in (self.aeat_send_error or ""):
+                return {
+                    "IDOtro": {
+                        "CodigoPais": country_code,
+                        "IDType": "07",
+                        "ID": identifier,
+                    }
+                }
+            else:
+                if identifier_type == "":
+                    return {"NIF": identifier}
+                return {
+                    "IDOtro": {
+                        "CodigoPais": country_code,
+                        "IDType": identifier_type,
+                        "ID": identifier,
+                    },
+                }
+        elif gen_type == 2:
+            return {"IDOtro": {"IDType": "02", "ID": country_code + identifier}}
+        elif gen_type == 3 and identifier_type:
+            return {
+                "IDOtro": {
+                    "CodigoPais": country_code,
+                    "IDType": identifier_type,
+                    "ID": identifier,
+                },
+            }
+        elif gen_type == 3:
+            return {"NIF": identifier}
+
+    def _get_sii_gen_type(self):
+        """Make a choice for general invoice type
+
+        Returns:
+            int: 1 (National), 2 (Intracom), 3 (Export)
+        """
+        self.ensure_one()
+        partner_ident = self.asset_id.partner_id.property_account_position_id
+        partner_ident_type = partner_ident.sii_partner_identification_type
+        if partner_ident_type:
+            res = int(partner_ident_type)
+        elif partner_ident.name == "Régimen Intracomunitario":
+            res = 2
+        elif partner_ident.name == "Régimen Extracomunitario":
+            res = 3
+        else:
+            res = 1
+        return res
+
+    def _get_sii_body(self, cancel=False):
+        body = {
+            "PeriodoLiquidacion": {"Ejercicio": self.year, "Periodo": "0A"},
+            "IDFactura": {
+                "IDEmisorFactura": {
+                    "NombreRazon": self.asset_id.partner_id.name[0:120],
+                    # "NIF": self.asset_id.partner_id.vat[2:],
+                    **self._get_sii_identifier(),
+                },
+                "NumSerieFacturaEmisor": (self.asset_id.invoice_ref or "")[0:60],
+                "FechaExpedicionFacturaEmisor": self._change_date_format(
+                    self.asset_id.invoice_date
+                ),
+            },
+        }
+        if cancel:
+            body["IdentificacionBien"] = self.asset_id.name.replace("\n", " ")[0:40]
+        else:
+            body["BienesInversion"] = {
+                "IdentificacionBien": self.asset_id.name.replace("\n", " ")[0:40],
+                "FechaInicioUtilizacion": self._change_date_format(
+                    self.asset_id.date_start
+                ),
+                "ProrrataAnualDefinitiva": self.prorate_percent,
+                # OPCIONALES
+                "RegularizacionAnualDeduccion": self.amount,
+                # "IdentificacionEntrega": None,
+                # RegularizacionDeduccionEfectuada is used when asset
+                # is sold. Not implemented¡
+                # "RegularizacionDeduccionEfectuada": (
+                #   self.asset_id.final_deductible_tax_amount
+                #   ),
+                # "RefExterna": (self.asset_id.invoice_ref or "")[0:60],
+                # "NumRegistroAcuerdoFacturacion": None,
+                # "EntidadSucedida": {
+                #     "NombreRazon": self.asset_id.partner_id.name[0:120],
+                #     "NIF": self.asset_id.partner_id.vat[2:],
+                # },
+            }
+        return body
+
+    def _get_sii_asset_dict(self, cancel=False):
+        self._aeat_check_exceptions()
+        asset_dict = self._get_sii_body(cancel)
+        round_by_keys(
+            asset_dict,
+            [
+                "ProrrataAnualDefinitiva",
+                "RegularizacionAnualDeduccion",
+                "RegularizacionDeduccionEfectuada",
+            ],
+        )
+        return asset_dict
+
+    def _change_date_format(self, date):
+        datetimeobject = fields.Date.to_date(date)
+        new_date = datetimeobject.strftime("%d-%m-%Y")
+        return new_date
+
+    def _check_fiscal_position(self):
+        partner_fiscal_position = self.asset_id.partner_id.property_account_position_id
+        asset_invoice = self.asset_id.invoice_move_line_id.move_id
+        if asset_invoice:
+            if asset_invoice.fiscal_position_id != partner_fiscal_position:
+                raise ValidationError(
+                    _(
+                        "The fiscal position of the "
+                        "partner and of the invoice is different. "
+                        "Please review asset: %(asset_id)i %(asset_name)s",
+                        asset_id=self.asset_id.id,
+                        asset_name=self.asset_id.name,
+                    )
+                )
+
+    def _get_aeat_country_code(self):
+        self.ensure_one()
+        return self._aeat_get_partner()._parse_aeat_vat_info()[0]
+
+    def _aeat_get_partner(self):
+        return self.asset_id.partner_id
+
+    def _is_aeat_simplified_invoice(self):
+        """Inheritable method to allow control when a
+        document is simplified or normal"""
+        partner = self._aeat_get_partner()
+        return partner.aeat_simplified_invoice
+
+    def _aeat_check_exceptions(self):
+        """Inheritable method for exceptions control when sending SII documents."""
+        self.ensure_one()
+        self._check_fiscal_position()
+        gen_type = self._get_sii_gen_type()
+        partner = self._aeat_get_partner()
+        country_code = self._get_aeat_country_code()
+        if (gen_type != 3 or country_code == "ES") and not partner.vat:
+            raise exceptions.UserError(_("The partner has not a VAT configured."))
+        if not self.asset_id.company_id.chart_template:
+            raise exceptions.UserError(
+                _("You have to select what account chart template use this company.")
+            )
+        if not self.asset_id.company_id.sii_enabled:
+            raise exceptions.UserError(_("This company doesn't have SII enabled."))
+
+    def unlink(self):
+        res = super().unlink()
+        for rec in self:
+            if rec.aeat_state != "not_sent":
+                raise ValidationError(
+                    _(
+                        "You can't delete a capital asset prorate "
+                        "regularization line if it has been previously sent"
+                    )
+                )
+        return res
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/mod303.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/mod303.py
new file mode 100644
index 000000000..c6b8daf2b
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/mod303.py
@@ -0,0 +1,75 @@
+# Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+# Copyright NuoBiT Solutions SL - Eric Antones <eantones@nuobit.com>
+# Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
+
+
+from odoo import _, fields, models
+from odoo.exceptions import ValidationError
+
+
+class L10nEsAeatMod303Report(models.AbstractModel):
+    _inherit = "l10n.es.aeat.mod303.report"
+
+    prorate_asset_lines_to_send = fields.One2many(
+        comodel_name="capital.asset.prorate.regularization",
+        compute="_compute_prorate_asset_lines_to_send",
+    )
+
+    def _compute_prorate_asset_lines_to_send(self):
+        for rec in self:
+            rec.prorate_asset_lines_to_send = (
+                rec.capital_asset_prorate_regularization_line_ids.filtered(
+                    lambda x: x.aeat_state not in ["sent"]
+                )
+            )
+
+    prorate_asset_lines_to_cancel = fields.One2many(
+        comodel_name="capital.asset.prorate.regularization",
+        compute="_compute_prorate_asset_lines_to_cancel",
+    )
+
+    def _compute_prorate_asset_lines_to_cancel(self):
+        for rec in self:
+            rec.prorate_asset_lines_to_cancel = (
+                rec.capital_asset_prorate_regularization_line_ids.filtered(
+                    lambda x: x.aeat_state not in ["cancelled", "not_sent"]
+                )
+            )
+
+    def send_sii(self):
+        for report in self:
+            if (
+                self.move_prorate_capital_asset_id
+                and self.move_prorate_capital_asset_id.state == "draft"
+            ):
+                raise ValidationError(
+                    _(
+                        "Please, post capital asset prorate move of the 303 model "
+                        "before send capital asset prorate regularization to SII"
+                    )
+                )
+            for line in report.prorate_asset_lines_to_send:
+                line.send_asset_sii()
+
+    def cancel_sii(self):
+        for report in self:
+            for line in report.prorate_asset_lines_to_cancel:
+                line.cancel_asset_sii()
+
+    def button_unpost(self):
+        res = super().button_unpost()
+        if self.prorate_asset_lines_to_cancel:
+            raise ValidationError(
+                _(
+                    "Exist prorate lines in year: "
+                    "%(year)s in assets %(assets)s with "
+                    "capital asset prorate lines. "
+                    "Please send the cancellation to the "
+                    "sii before canceling the 303 model.",
+                    year=self.year,
+                    assets=self.prorate_asset_lines_to_cancel,
+                )
+            )
+        self.cancel_sii()
+        return res
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/res_company.py b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/res_company.py
new file mode 100644
index 000000000..a24834651
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/models/res_company.py
@@ -0,0 +1,56 @@
+# Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+# Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from datetime import datetime, timedelta
+
+import pytz
+
+from odoo import fields, models
+
+
+class ResCompany(models.Model):
+    _inherit = "res.company"
+
+    capital_asset_use_connector = fields.Boolean(
+        string="Use connector",
+        help="Check it to use connector instead of sending the invoice "
+        "directly when it's validated",
+    )
+    capital_asset_send_mode = fields.Selection(
+        string="Send mode",
+        selection=[
+            ("auto", "On validate"),
+            ("fixed", "At fixed time"),
+            ("delayed", "With delay"),
+        ],
+        default="auto",
+    )
+    capital_asset_sent_time = fields.Float(
+        string="Sent time",
+    )
+    capital_asset_delay_time = fields.Float(
+        string="Delay time",
+    )
+
+    # TODO: This code is like _get_sii_eta.
+    # Refactor and fix bugs in fixed mode and make an a PR
+    def _get_sii_eta_capital_assets(self):
+        if self.capital_asset_send_mode == "fixed":
+            tz = self.env.context.get("tz", self.env.user.partner_id.tz)
+            offset = datetime.now(pytz.timezone(tz)).strftime("%z") if tz else "+00"
+            hour_diff = int(offset[:3])
+            hour, minute = divmod(self.capital_asset_sent_time * 60, 60)
+            hour = int(hour - hour_diff)
+            minute = int(minute)
+            now = datetime.now()
+            if now.hour > hour or (now.hour == hour and now.minute > minute):
+                now += timedelta(days=1)
+            now = now.replace(hour=hour, minute=minute)
+            return now
+        elif self.send_mode == "delayed":
+            return datetime.now() + timedelta(
+                seconds=self.capital_asset_delay_time * 3600
+            )
+        else:
+            return None
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/pyproject.toml b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/pyproject.toml
new file mode 100644
index 000000000..4231d0ccc
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/readme/CONTRIBUTORS.md b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/readme/CONTRIBUTORS.md
new file mode 100644
index 000000000..0355cecbc
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/readme/CONTRIBUTORS.md
@@ -0,0 +1,4 @@
+- [NuoBiT](https://www.nuobit.com):
+  - Kilian Niubo <kniubo@nuobit.com>
+  - Eric Antones <eantones@nuobit.com>
+  - Deniz Gallo <dgallo@nuobit.com>
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/readme/DESCRIPTION.md b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/readme/DESCRIPTION.md
new file mode 100644
index 000000000..b563444d9
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/readme/DESCRIPTION.md
@@ -0,0 +1 @@
+This module allows send to SII automaticaly the capital assets prorate regularization.
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/static/description/icon.png b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/static/description/icon.png
new file mode 100644
index 000000000..1cd641e79
Binary files /dev/null and b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/static/description/icon.png differ
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/static/description/index.html b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/static/description/index.html
new file mode 100644
index 000000000..f11276958
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/static/description/index.html
@@ -0,0 +1,422 @@
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+  border-left: solid 1px black;
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+</head>
+<body>
+<div class="document" id="aeat-sii-special-prorate-regularization-capital-asset">
+<h1 class="title">AEAT SII - Special Prorate Regularization Capital Asset</h1>
+
+<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!! This file is generated by oca-gen-addon-readme !!
+!! changes will be overwritten.                   !!
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!! source digest: sha256:99123384c24c2b73dc236e771222caff831de4cec8cc8cb9a81ff1e0a04564a1
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
+<p><a class="reference external image-reference" href="https://odoo-community.org/page/development-status"><img alt="Beta" src="https://img.shields.io/badge/maturity-Beta-yellow.png" /></a> <a class="reference external image-reference" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external image-reference" href="https://github.com/NuoBiT/odoo-addons/tree/18.0/l10n_es_aeat_sii_special_prorate_regularization_capital_asset"><img alt="NuoBiT/odoo-addons" src="https://img.shields.io/badge/github-NuoBiT%2Fodoo--addons-lightgray.png?logo=github" /></a></p>
+<p>This module allows send to SII automaticaly the capital assets prorate
+regularization.</p>
+<p><strong>Table of contents</strong></p>
+<div class="contents local topic" id="contents">
+<ul class="simple">
+<li><a class="reference internal" href="#bug-tracker" id="toc-entry-1">Bug Tracker</a></li>
+<li><a class="reference internal" href="#credits" id="toc-entry-2">Credits</a><ul>
+<li><a class="reference internal" href="#authors" id="toc-entry-3">Authors</a></li>
+<li><a class="reference internal" href="#contributors" id="toc-entry-4">Contributors</a></li>
+<li><a class="reference internal" href="#maintainers" id="toc-entry-5">Maintainers</a></li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="bug-tracker">
+<h1><a class="toc-backref" href="#toc-entry-1">Bug Tracker</a></h1>
+<p>Bugs are tracked on <a class="reference external" href="https://github.com/NuoBiT/odoo-addons/issues">GitHub Issues</a>.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+<a class="reference external" href="https://github.com/NuoBiT/odoo-addons/issues/new?body=module:%20l10n_es_aeat_sii_special_prorate_regularization_capital_asset%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
+<p>Do not contact contributors directly about support or help with technical issues.</p>
+</div>
+<div class="section" id="credits">
+<h1><a class="toc-backref" href="#toc-entry-2">Credits</a></h1>
+<div class="section" id="authors">
+<h2><a class="toc-backref" href="#toc-entry-3">Authors</a></h2>
+<ul class="simple">
+<li>NuoBiT Solutions SL</li>
+</ul>
+</div>
+<div class="section" id="contributors">
+<h2><a class="toc-backref" href="#toc-entry-4">Contributors</a></h2>
+<ul class="simple">
+<li><a class="reference external" href="https://www.nuobit.com">NuoBiT</a>:<ul>
+<li>Kilian Niubo <a class="reference external" href="mailto:kniubo&#64;nuobit.com">kniubo&#64;nuobit.com</a></li>
+<li>Eric Antones <a class="reference external" href="mailto:eantones&#64;nuobit.com">eantones&#64;nuobit.com</a></li>
+<li>Deniz Gallo <a class="reference external" href="mailto:dgallo&#64;nuobit.com">dgallo&#64;nuobit.com</a></li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="maintainers">
+<h2><a class="toc-backref" href="#toc-entry-5">Maintainers</a></h2>
+<p>This module is part of the <a class="reference external" href="https://github.com/NuoBiT/odoo-addons/tree/18.0/l10n_es_aeat_sii_special_prorate_regularization_capital_asset">NuoBiT/odoo-addons</a> project on GitHub.</p>
+<p>You are welcome to contribute.</p>
+</div>
+</div>
+</div>
+</body>
+</html>
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/account_asset.xml b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/account_asset.xml
new file mode 100644
index 000000000..502a791e1
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/account_asset.xml
@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+     Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl) -->
+<odoo>
+    <record id="account_asset_view_form" model="ir.ui.view">
+        <field name="model">account.asset</field>
+        <field
+            name="inherit_id"
+            ref="l10n_es_aeat_mod303_special_prorate_regularization_capital_asset.account_asset_view_form"
+        />
+        <field name="arch" type="xml">
+            <list
+                name="active_capital_asset_prorate_regularization_ids"
+                position="inside"
+            >
+                <field name="aeat_state" />
+                <field name="aeat_send_error" />
+                <field name="sii_enabled" invisible="1" />
+                <button
+                    type="object"
+                    icon="fa-upload"
+                    string="Send asset to SII"
+                    name="send_asset_sii"
+                    groups="l10n_es_aeat.group_account_aeat"
+                    invisible="not sii_enabled or aeat_state == 'sent'"
+                />
+                <button
+                    type="object"
+                    icon="fa-ban"
+                    string="Send cancellation to SII"
+                    name="cancel_asset_sii"
+                    groups="l10n_es_aeat.group_account_aeat"
+                    invisible="not sii_enabled or aeat_state not in ['sent','sent_w_errors','sent_modified']"
+                />
+            </list>
+        </field>
+    </record>
+    <record id="account_asset_view_search" model="ir.ui.view">
+        <field name="name">account.asset.search</field>
+        <field name="model">account.asset</field>
+        <field
+            name="inherit_id"
+            ref="account_asset_management.account_asset_view_search"
+        />
+        <field name="arch" type="xml">
+            <filter name="inactive" position="after">
+                <separator />
+                <filter
+                    string="SII Sent"
+                    name="SII_sent"
+                    domain="[('active_capital_asset_prorate_regularization_ids.aeat_state', '=', 'sent')]"
+                />
+
+                <filter
+                    string="SII not sent"
+                    name="SII_not_sent"
+                    domain="[('active_capital_asset_prorate_regularization_ids.aeat_state', '=', 'not_sent')]"
+                />
+                <filter
+                    string="SII sent with errors"
+                    name="SII_sent_w_errors"
+                    domain="[('active_capital_asset_prorate_regularization_ids.aeat_state', '=', 'sent_w_errors')]"
+                />
+                <separator />
+                <filter
+                    string="SII Cancelled"
+                    name="SII_cancelled"
+                    domain="[('active_capital_asset_prorate_regularization_ids.aeat_state', '=', 'cancelled')]"
+                />
+            </filter>
+            <filter name="method_groupby" position="after">
+                <separator />
+                <filter
+                    string="SII error"
+                    name="SII_error"
+                    context="{'group_by': 'sii_send_errors'}"
+                />
+            </filter>
+        </field>
+    </record>
+</odoo>
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/capital_asset_prorate_regularization.xml b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/capital_asset_prorate_regularization.xml
new file mode 100644
index 000000000..24bcac43f
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/capital_asset_prorate_regularization.xml
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+     Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl) -->
+<odoo>
+    <record id="capital_asset_prorate_regularization_view_form" model="ir.ui.view">
+        <field name="name">capital.asset.prorate.regularization.form</field>
+        <field name="model">capital.asset.prorate.regularization</field>
+        <field name="arch" type="xml">
+            <form string="Capital Asset Prorate Regularization">
+                <group string="SII Information" name="group_sii_information">
+                    <field name="year" />
+                    <field name="amount" />
+                    <field name="prorate_percent" />
+                    <field name="mod303_id" />
+                </group>
+                <group
+                    string="SII Result"
+                    name="group_sii_result"
+                    groups="l10n_es_aeat.group_account_aeat"
+                >
+                    <notebook>
+                        <page name="page_sii_result_general" string="General">
+                            <group>
+                                <field name="aeat_state" />
+                                <field
+                                    name="aeat_send_failed"
+                                    invisible="not aeat_send_failed"
+                                />
+                                <field
+                                    name="aeat_send_error"
+                                    invisible="not aeat_send_failed"
+                                />
+                                <field name="sii_csv" />
+                            </group>
+                        </page>
+                        <page
+                            name="page_sii_result_technical"
+                            string="Technical"
+                            groups="base.group_no_one"
+                        >
+                            <group>
+                                <label for="aeat_header_sent" />
+                            </group>
+                            <field name="aeat_header_sent" />
+                            <group>
+                                <label for="aeat_content_sent" />
+                            </group>
+                            <field name="aeat_content_sent" />
+                            <group>
+                                <label for="sii_return" />
+                            </group>
+                            <field name="sii_return" />
+                        </page>
+                    </notebook>
+                </group>
+                <group string="Connector Jobs" name="group_sii_jobs">
+                    <field
+                        name="asset_prorate_line_job_ids"
+                        options="{'reload_on_button': true}"
+                        nolabel="1"
+                        readonly="1"
+                        context="{'tree_view_ref': 'l10n_es_aeat_sii_oca.view_queue_job_sii'}"
+                    />
+                </group>
+            </form>
+        </field>
+    </record>
+</odoo>
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/mod303_views.xml b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/mod303_views.xml
new file mode 100644
index 000000000..add908e1d
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/mod303_views.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+     Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl) -->
+<odoo>
+    <record id="view_l10n_es_aeat_mod303_report_form" model="ir.ui.view">
+        <field name="name">l10n_es.aeat.mod303.report.prorate.form</field>
+        <field name="model">l10n.es.aeat.mod303.report</field>
+        <field
+            name="inherit_id"
+            ref="l10n_es_aeat_mod303.view_l10n_es_aeat_mod303_report_form"
+        />
+        <field name="arch" type="xml">
+            <button name="button_open_move" position="after">
+                <field name="prorate_asset_lines_to_send" invisible="1" />
+                <field name="prorate_asset_lines_to_cancel" invisible="1" />
+                <button
+                    type="object"
+                    string="Send field 43 to SII"
+                    help="Send capital assets prorate regularization to SII"
+                    name="send_sii"
+                    invisible="not prorate_asset_lines_to_send or state != 'posted'"
+                    groups="l10n_es_aeat.group_account_aeat"
+                />
+                <button
+                    type="object"
+                    string="Cancel field 43 to SII"
+                    help="Cancel capital assets prorate regularization SII"
+                    name="cancel_sii"
+                    invisible="not prorate_asset_lines_to_send"
+                    groups="l10n_es_aeat.group_account_aeat"
+                />
+            </button>
+        </field>
+    </record>
+</odoo>
diff --git a/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/res_company_view.xml b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/res_company_view.xml
new file mode 100644
index 000000000..6b0804a1f
--- /dev/null
+++ b/l10n_es_aeat_sii_special_prorate_regularization_capital_asset/views/res_company_view.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!-- Copyright NuoBiT Solutions SL - Kilian Niubo <kniubo@nuobit.com>
+     Copyright 2026 NuoBiT Solutions SL - Deniz Gallo <dgallo@nuobit.com>
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl) -->
+<odoo>
+    <record id="view_company_capital_asset_sii_form" model="ir.ui.view">
+        <field name="name">res.company.sii.form</field>
+        <field name="model">res.company</field>
+        <field name="inherit_id" ref="l10n_es_aeat_sii_oca.view_company_sii_form" />
+        <field name="arch" type="xml">
+            <group name="cron_config" position="after">
+                <group
+                    name="capital_assets_sii_connector"
+                    string="Capital Asset connector config"
+                >
+                    <field name="capital_asset_use_connector" />
+                    <field
+                        name="capital_asset_send_mode"
+                        invisible="not capital_asset_use_connector"
+                    />
+                    <field
+                        name='capital_asset_sent_time'
+                        widget='float_time'
+                        invisible="not capital_asset_use_connector or capital_asset_send_mode != 'fixed'"
+                    />
+                    <field
+                        name='capital_asset_delay_time'
+                        widget='float_time'
+                        invisible="not capital_asset_use_connector or capital_asset_send_mode != 'delayed'"
+                    />
+                </group>
+            </group>
+        </field>
+    </record>
+</odoo>
diff --git a/test-requirements.txt b/test-requirements.txt
new file mode 100644
index 000000000..7801af7e1
--- /dev/null
+++ b/test-requirements.txt
@@ -0,0 +1,11 @@
+odoo-addon-l10n_es_extension@git+https://github.com/nuobit/odoo-addons.git@refs/pull/769/head#subdirectory=l10n_es_extension
+odoo-addon-account_asset_management_extension@git+https://github.com/nuobit/odoo-addons.git@refs/pull/754/head#subdirectory=account_asset_management_extension
+odoo-addon-l10n_es_asset_extension@git+https://github.com/nuobit/odoo-addons.git@refs/pull/780/head#subdirectory=l10n_es_asset_extension
+odoo-addon-l10n_es_account_capital_asset@git+https://github.com/nuobit/odoo-addons.git@refs/pull/814/head#subdirectory=l10n_es_account_capital_asset
+odoo-addon-l10n_es_special_prorate@git+https://github.com/nuobit/odoo-addons.git@refs/pull/800/head#subdirectory=l10n_es_special_prorate
+odoo-addon-l10n_es_aeat_mod303_special_prorate_regularization@git+https://github.com/nuobit/odoo-addons.git@refs/pull/846/head#subdirectory=l10n_es_aeat_mod303_special_prorate_regularization
+odoo-addon-l10n_es_aeat_prorate_asset@git+https://github.com/nuobit/odoo-addons.git@refs/pull/834/head#subdirectory=l10n_es_aeat_prorate_asset
+odoo-addon-l10n_es_aeat_vat_special_prorrate@git+https://github.com/nuobit/odoo-addons.git@refs/pull/835/head#subdirectory=l10n_es_aeat_vat_special_prorrate
+odoo-addon-l10n_es_aeat_mod303_special_prorate_regularization_capital_asset@git+https://github.com/nuobit/odoo-addons.git@refs/pull/851/head#subdirectory=l10n_es_aeat_mod303_special_prorate_regularization_capital_asset
+odoo-addon-account_asset_transfer_extension@git+https://github.com/nuobit/odoo-addons.git@refs/pull/763/head#subdirectory=account_asset_transfer_extension
+odoo-addon-l10n_es_aeat_sii_oca_extension@git+https://github.com/nuobit/odoo-addons.git@refs/pull/801/head#subdirectory=l10n_es_aeat_sii_oca_extension