When the seller is foreign, the Fiscal Regime of the seller must be set to 'RF18', as per: https://www.fattura24.com/manuale/altri-documenti/autofattura-fornitori/ Task: https://www.odoo.com/web#id=3010849&model=project.task opw-3010849 closes odoo/odoo#104903 X-original-commit: 07747178a230071f9ca3cd7202ad571f80a330c0 Signed-off-by: Josse Colpaert <jco@odoo.com> Signed-off-by: Paolo Gatti (pgi) <pgi@odoo.com>