Glossary

AT

Published 30 October 2026, 20:39
Autoridade Tributária e Aduaneira

Portugal's tax and customs service. Most people deal with it for a tax number, the online account, notices about IRS, IMI and other taxes, and requests through e-balcão.

Where you come across it. Your Finanças online account, letters about taxes, e-balcão, IMI and IRS payments.
People often just call it “Finanças”, meaning the same service.
Official website: portaldasfinancas.gov.pt