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‎l10n_it_edi_oss/README.rst‎

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=========================
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Italy - E-invoicing - OSS
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=========================
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..
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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!! This file is generated by oca-gen-addon-readme !!
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!! changes will be overwritten. !!
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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!! source digest: sha256:1e9d2501f6aacc03319d6346c6de801fcfdcbb7a049c66d039aca3bb86e09eec
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
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:target: https://odoo-community.org/page/development-status
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:alt: Beta
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.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
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:target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
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:alt: License: AGPL-3
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.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fl10n--italy-lightgray.png?logo=github
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:target: https://github.com/OCA/l10n-italy/tree/18.0/l10n_it_edi_oss
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:alt: OCA/l10n-italy
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.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
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:target: https://translation.odoo-community.org/projects/l10n-italy-18-0/l10n-italy-18-0-l10n_it_edi_oss
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:alt: Translate me on Weblate
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.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
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:target: https://runboat.odoo-community.org/builds?repo=OCA/l10n-italy&target_branch=18.0
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:alt: Try me on Runboat
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|badge1| |badge2| |badge3| |badge4| |badge5|
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Modulo tecnico per l'integrazione tra ``l10n_eu_oss_oca`` (regime OSS -
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One Stop Shop) e ``l10n_it_edi`` (fatturazione elettronica italiana).
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Quando viene emessa una fattura con un'imposta OSS, il modulo modifica
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la generazione del file XML FatturaPA per:
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- Impostare AliquotaIVA a 0,00 (invece dell'aliquota estera effettiva)
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- Aggiungere il codice Natura N3.2 (non imponibile - cessioni
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intracomunitarie)
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- Aggiungere un blocco AltriDatiGestionali con TipoDato "OSS" e
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l'aliquota effettiva
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- Impostare Imposta a 0,00 nel riepilogo DatiRiepilogo
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- Aggiungere il RiferimentoNormativo con il riferimento all'Art. 41
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D.L. 331/1993
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Inoltre, quando vengono create nuove imposte OSS tramite il wizard di
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``l10n_eu_oss_oca``, il modulo imposta automaticamente il codice Natura
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e il riferimento normativo.
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--------------
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Technical module integrating ``l10n_eu_oss_oca`` (OSS - One Stop Shop
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regime) with ``l10n_it_edi`` (Italian electronic invoicing).
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When an invoice is issued with an OSS tax, this module modifies the
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FatturaPA XML generation to:
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- Set AliquotaIVA to 0.00 (instead of the actual foreign tax rate)
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- Add the Natura code N3.2 (non-taxable - intra-community transfers)
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- Add an AltriDatiGestionali block with TipoDato "OSS" and the actual
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tax rate
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- Set Imposta to 0.00 in the DatiRiepilogo summary
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- Add the RiferimentoNormativo with the reference to Art. 41 D.L.
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331/1993
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Additionally, when new OSS taxes are created through the
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``l10n_eu_oss_oca`` wizard, the module automatically sets the Natura
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code and law reference.
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**Table of contents**
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.. contents::
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:local:
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Bug Tracker
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===========
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Bugs are tracked on `GitHub Issues <https://github.com/OCA/l10n-italy/issues>`_.
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In case of trouble, please check there if your issue has already been reported.
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If you spotted it first, help us to smash it by providing a detailed and welcomed
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`feedback <https://github.com/OCA/l10n-italy/issues/new?body=module:%20l10n_it_edi_oss%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
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Do not contact contributors directly about support or help with technical issues.
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Credits
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=======
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Authors
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-------
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* Lorenzo Battistini
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Contributors
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------------
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- Lorenzo Battistini
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Maintainers
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-----------
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This module is maintained by the OCA.
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.. image:: https://odoo-community.org/logo.png
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:alt: Odoo Community Association
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:target: https://odoo-community.org
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OCA, or the Odoo Community Association, is a nonprofit organization whose
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mission is to support the collaborative development of Odoo features and
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promote its widespread use.
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This module is part of the `OCA/l10n-italy <https://github.com/OCA/l10n-italy/tree/18.0/l10n_it_edi_oss>`_ project on GitHub.
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You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

‎l10n_it_edi_oss/__init__.py‎

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from . import models
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from . import wizard
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OSS_EXEMPT_REASON = "N3.2"
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OSS_LAW_REFERENCE = "Art. 41 D.L. 331/1993"
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def _l10n_it_edi_oss_post_init_hook(env):
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oss_taxes = env["account.tax"].search(
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[
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("oss_country_id", "!=", False),
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("company_id.account_fiscal_country_id.code", "=", "IT"),
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"|",
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("l10n_it_exempt_reason", "=", False),
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("l10n_it_exempt_reason", "!=", OSS_EXEMPT_REASON),
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]
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)
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if oss_taxes:
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oss_taxes.write(
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{
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"l10n_it_exempt_reason": OSS_EXEMPT_REASON,
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"l10n_it_law_reference": OSS_LAW_REFERENCE,
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}
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)

‎l10n_it_edi_oss/__manifest__.py‎

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# Copyright 2026 Lorenzo Battistini
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# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
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{
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"name": "Italy - E-invoicing - OSS",
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"version": "18.0.1.0.0",
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"category": "Accounting/Localizations/EDI",
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"development_status": "Beta",
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"summary": "Bridge module between l10n_eu_oss_oca and Italian electronic invoicing",
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"author": "Lorenzo Battistini, Odoo Community Association (OCA)",
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"website": "https://github.com/OCA/l10n-italy",
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"license": "AGPL-3",
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"depends": [
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"l10n_it_edi",
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"l10n_eu_oss_oca",
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],
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"installable": True,
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"post_init_hook": "_l10n_it_edi_oss_post_init_hook",
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}

‎l10n_it_edi_oss/models/__init__.py‎

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from . import account_move

‎l10n_it_edi_oss/models/account_move.py‎

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# Copyright 2026 Lorenzo Battistini
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# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
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from odoo import api, models
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class AccountMove(models.Model):
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_inherit = "account.move"
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@api.model
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def _l10n_it_edi_grouping_function_base_lines(self, base_line, tax_data):
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result = super()._l10n_it_edi_grouping_function_base_lines(base_line, tax_data)
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if result and tax_data and tax_data["tax"].oss_country_id:
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result["tax_amount_field"] = 0.0
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return result
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@api.model
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def _l10n_it_edi_grouping_function_tax_lines(self, base_line, tax_data):
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result = super()._l10n_it_edi_grouping_function_tax_lines(base_line, tax_data)
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if result and tax_data and tax_data["tax"].oss_country_id:
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result["tax_amount_field"] = 0.0
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result["is_oss"] = True
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return result
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def _l10n_it_edi_add_base_lines_xml_values(
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self, base_lines_aggregated_values, is_downpayment
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):
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super()._l10n_it_edi_add_base_lines_xml_values(
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base_lines_aggregated_values, is_downpayment
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)
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for base_line, _aggregated_values in base_lines_aggregated_values:
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oss_taxes = base_line["tax_ids"].filtered(lambda t: t.oss_country_id)
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if oss_taxes:
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base_line["it_values"]["altri_dati_gestionali_list"].append(
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{
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"tipo_dato": "OSS",
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"riferimento_testo": f"{oss_taxes[0].amount:.2f}",
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"riferimento_numero": None,
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"riferimento_data": None,
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}
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)
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def _l10n_it_edi_get_tax_lines_xml_values(
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self, base_lines_aggregated_values, values_per_grouping_key
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):
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tax_lines = super()._l10n_it_edi_get_tax_lines_xml_values(
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base_lines_aggregated_values, values_per_grouping_key
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)
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# Set imposta to 0.0 for OSS entries.
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# Iterate values_per_grouping_key in the same order as super() to
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# correlate grouping keys with the returned tax_lines by index.
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idx = 0
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for values in values_per_grouping_key.values():
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grouping_key = values["grouping_key"]
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if not grouping_key or grouping_key.get("skip"):
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continue
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if grouping_key.get("is_oss") and idx < len(tax_lines):
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tax_lines[idx]["imposta"] = 0.0
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idx += 1
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return tax_lines

‎l10n_it_edi_oss/pyproject.toml‎

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[build-system]
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requires = ["whool"]
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build-backend = "whool.buildapi"

‎l10n_it_edi_oss/readme/CONTRIBUTORS.md‎

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- Lorenzo Battistini

‎l10n_it_edi_oss/readme/DESCRIPTION.md‎

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Modulo tecnico per l'integrazione tra `l10n_eu_oss_oca` (regime OSS - One Stop Shop)
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e `l10n_it_edi` (fatturazione elettronica italiana).
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Quando viene emessa una fattura con un'imposta OSS, il modulo modifica la generazione
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del file XML FatturaPA per:
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- Impostare AliquotaIVA a 0,00 (invece dell'aliquota estera effettiva)
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- Aggiungere il codice Natura N3.2 (non imponibile - cessioni intracomunitarie)
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- Aggiungere un blocco AltriDatiGestionali con TipoDato "OSS" e l'aliquota effettiva
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- Impostare Imposta a 0,00 nel riepilogo DatiRiepilogo
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- Aggiungere il RiferimentoNormativo con il riferimento all'Art. 41 D.L. 331/1993
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Inoltre, quando vengono create nuove imposte OSS tramite il wizard di `l10n_eu_oss_oca`,
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il modulo imposta automaticamente il codice Natura e il riferimento normativo.
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---
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Technical module integrating `l10n_eu_oss_oca` (OSS - One Stop Shop regime) with
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`l10n_it_edi` (Italian electronic invoicing).
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When an invoice is issued with an OSS tax, this module modifies the FatturaPA XML
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generation to:
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- Set AliquotaIVA to 0.00 (instead of the actual foreign tax rate)
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- Add the Natura code N3.2 (non-taxable - intra-community transfers)
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- Add an AltriDatiGestionali block with TipoDato "OSS" and the actual tax rate
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- Set Imposta to 0.00 in the DatiRiepilogo summary
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- Add the RiferimentoNormativo with the reference to Art. 41 D.L. 331/1993
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Additionally, when new OSS taxes are created through the `l10n_eu_oss_oca` wizard,
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the module automatically sets the Natura code and law reference.

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