To enable VAT validation (VIES/ simple), the base_vat module needs to be installed. base_vat extends models where the validation should apply. This means it only works with models in account, unless the module is added as a dependency (base_vat depends on account) To avoid this dependency (in account reports - see enterprise PR odoo/enterprise#34068), two methods required for VAT validation are added to res.partner so that the enterprise module is able to use this feature with/without base_vat. closes odoo/odoo#106046 Signed-off-by: Olivier Colson (oco) <oco@odoo.com>