Portugal's Tax and Customs Authority has issued a notice dated 14 December 2021 regarding a new simplified procedure for certifying tax residency forms for the purpose of tax treaty benefits from 1 January 2022. --- The Tax and Customs Authority (AT) simplified the procedure for certifying tax residency on forms from foreign tax administrations. As of January 1, 2022, you no longer need to send us these forms. After that date, you only need to visit the Finance Portal (Portal das Finanças) at https://www.portaldasfinancas.gov.pt, and then request a tax residency certificate for the purpose of activating the Double Taxation Agreement....