Residency and Tax Returns By Advertiser, in Business · 02-07-2021 01:00:00 · 0 Comments The Sovereign Group has been assisting clients in Portugal with their fiscal queries for close to three decades. Whilst in the past these queries related mostly to property ownership or rental as well as providing support to foreign residents with regards to their tax returns, in the last year we have seen an unprecedented amount of individuals wanting guidance on the full implications of moving to Portugal and taking up tax residency. To become a resident using an EU passport the process is relatively straightforward which involves a trip to the local town hall for the residency certificate which is then registered at the tax department for the individual to become tax resident.