[FIX] l10n_es_atc_sii_oca: Identifier type '02' for Contraparte not exists in SII atc

TT60254

Author: sergio-teruel

l10n_es_atc_sii_oca/models/__init__.py

@@ -1 +1,2 @@
 from . import account_move
+from . import res_partner

l10n_es_atc_sii_oca/models/account_move.py

@@ -62,3 +62,10 @@ def _get_aeat_invoice_dict_in(self, cancel=False):
         ):
             inv_dict = self._sii_atc_replace_tax_keys(inv_dict)
         return inv_dict
+
+    def _get_sii_identifier(self):
+        if self._get_sii_tax_agency() == self.env.ref(
+            "l10n_es_aeat.aeat_tax_agency_canarias"
+        ):
+            self = self.with_context(is_canary_tax_agency=True)
+        return super()._get_sii_identifier()

l10n_es_atc_sii_oca/models/res_partner.py

@@ -0,0 +1,32 @@
+# Copyright 2026 Tecnativa - Carlos Dauden
+# Copyright 2026 Tecnativa - Sergio Teruel
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo import models
+from odoo.tools import ormcache_context
+
+
+class ResPartner(models.Model):
+    _inherit = "res.partner"
+
+    @ormcache_context("self.vat, self.country_id", keys=("is_canary_tax_agency",))
+    def _parse_aeat_vat_info(self):
+        # NOTE:
+        # The Canary Islands Tax Agency (ATC) SII-IGIC implementation does NOT support
+        # IDType "02" (EU VAT number / NIF-IVA) used by the Spanish AEAT SII (VAT).
+        #
+        # Although the data structure is similar, ATC does not validate intra-community
+        # operators nor VIES registrations, since IGIC is not VAT.
+        #
+        # As a result, foreign VAT numbers must be reported using IDType "04"
+        # ("Official identification document") instead of "02".
+        #
+        # Using IDType "02" causes ATC to reject the record with error code 1103
+        # ("Valor del campo IDType incorrecto").
+        #
+        # This conversion is intentional and required for SII submissions to ATC.
+        country_code, identifier_type, identifier = super()._parse_aeat_vat_info()
+        is_canary_tax_agency = self.env.context.get("is_canary_tax_agency")
+        if is_canary_tax_agency and identifier_type == "02":
+            identifier_type = "04"
+        return country_code, identifier_type, identifier