How to sign in to the Bizkaia Tax Office online portal
Digital certificate, B@kQ and other ways to sign in.
In a nutshell
- To deal with the Bizkaia Tax Office online you need to identify yourself.
- The most common ways are B@kQ, a digital certificate and the electronic DNI.
- If you don't have any of them, you can authorise someone to do it for you.
The online portal (sede electrónica) is the Tax Office's online office. To sign in you have to prove who you are.
Ways to sign in
- B@kQ: a Basque Government login used with your phone or a coordinates card. You apply for it at authorised offices or by video call.
- Digital certificate: a file you install on your computer. The most common one is from the FNMT.
- Electronic DNI: with a card reader or with your phone, if it has NFC.
- B@k: a card with codes, with fewer options than B@kQ.
What you can do once inside
- File returns.
- Request certificates.
- Look up your details and notifications.
- Manage authorisations for other people.
If you don't want to do it yourself. You can authorise someone to handle procedures for you. You only have to confirm that authorisation once.
Frequently asked questions
Which one do you recommend?
B@kQ is the most convenient in the Basque Country and works for many Basque administrations. A digital certificate also works outside the Basque Country.