You need to start by first learning about PT tax rates/scales. Do you have NHR?
If your annual income is less then euro8500, you dont have to submit tax return.
If your wife income is below this limit, but yours is above, you need to consider separate tax returns.
For you, you need to complete:
Rosto........covering page
Anexo J......foreign income form
Anexo L......NHR form, if applicable
Below is from someone else post on another forum. Use this for starting point and reserach each sections in detail. Online portal has help section (?).
For these documents, it appears your NIF goes in the part for "Sujeito Passivo A", but also in Anexo J and Anexo L Table 3A, "Identificao do titular do rendimento".
In certain sections, a code for the UK is required - this is 826.
The main work seems to be in filling out Anexo J.
In this form, pensions go in Table 5. For Table 5A, fill in the first three columns, pension code, country code, and gross amount.
The pension codes are H01 for company pensions (and State Pension?), code H02 being for "Public pensions"; I assume this means those government pensions always taxed in the UK (eg. teachers and civil service pensions).
In Table 5C, for further details of your entries in Table 5A, company pensions go under "Decorrentes de emprego anterior", and State Pension under "Seguranca social".
For income from renting out your UK home, use Table 7A. The columns are income code (F01), country code, net profit without tax, and tax paid abroad.
In Table 7B, and elsewhere, there is a choice with a question starting "Opta pelo englobamento ...". This refers to option to include sum in scaled tax rate income or Nao for flat tax rate of 28%.
