Update your email address or phone number

The Portal das Finanças account has contact details associated with it — an email address and a phone number.

Keeping your email address and phone number up to date is essential for secure and effective communication with the Tax and Customs Authority (Autoridade Tributária e Aduaneira – AT).

Why it matters:

  • You can register and update your email and phone number at any time on the Portal das Finanças.
  • Confirming these contacts ensures secure communication and allows for password retrieval via SMS.
  • Taxpayers who opt-in and confirm the contacts will receive regular updates by email and SMS about their tax obligations. These messages do not replace official notifications required by law.

How to register or update your contact details

  1. Log in to Portal das Finanças (Iniciar Sessão), using your credentials (NIF and password or Digital Mobile Key – CMD
  2. Navigate to Todos os Serviços​ > Dados Cadastrais​ > Dados de Contacto
  3. Select E-mail/Telefone​
  4. Here, you can:
    1. Register or update your email address and phone number
    2. Choose to receive emails or SMS
  5. After making changes, a confirmation procedure begins

Confirmation procedure

Every time you change your contacts:

  • A code will be sent to your email and/or mobile phone.
  • Each code is valid for one hour. You can only request a new code after this period.
  • Once you enter the codes, the contact status will show Confirmado
  • If the status shows Confirmação em curso, you must enter the code or request a new one.
    • Select Inserir código to enter the validation code.
    • If you no longer have the code, choose Obter novo código (after one hour).

To change the contact details again, select Alterar dados. This restarts the confirmation process.

Managing Communication consents (opt in / opt out)

To receive regular updates by email or SMS, you can activate the checkboxes shown under each contact detail.

By doing this, you give consent for AT to send to your confirmed contacts pe​rsonalised and useful information, including reminders that help you comply with your tax obligations before the deadlines.

These messages are informative and do not replace official notifications required by law.​


Associated links​​​​