Step-by-step guides
How to do it, step by step, and what you can leave to us.
How to register as self-employed in Bizkaia, step by step
Tax Office and Social Security at once: what to decide first, what gets filed and what happens next.
Step-by-step guideCertificate of not having to file an income tax return in Bizkaia
Who needs it and how to request it: grants, benefits, renting or a mortgage.
Step-by-step guideIAE certificate in Bizkaia: how to prove you're registered
What you're asked for it for and how to get it.
Step-by-step guideWhich IAE heading applies to me: how to choose it properly
With examples of the most common jobs.
Step-by-step guideI'm a foreigner: what I need to become self-employed in Bizkaia
NIE, work permit and Social Security number.
Step-by-step guideHow to change your tax address with the Bizkaia Tax Office
If you've moved, this is what you have to report and when.
Step-by-step guideHow to change your bank account with the Tax Office
For direct debits and refunds.
Step-by-step guideAdding or changing an activity when you're already self-employed
When you have to report it and what changes.
Step-by-step guideHow to withdraw an authorisation when you no longer want it
Step by step, on the online portal or with us.
Step-by-step guideI can't pay the Tax Office: how to ask for a deferral in Bizkaia
Which debts can be deferred and what you need.
Step-by-step guideHow to check whether an EU VAT number is valid in VIES
And why your client can't find you.
Step-by-step guideHow to deregister from the ROI
When it makes sense and what happens next.
Step-by-step guideHow to deregister as self-employed in Bizkaia
Tax Office and Social Security, in the right order and without forgetting anything.
Step-by-step guideTax calendar for the self-employed in Bizkaia
What's filed and when, month by month.
Step-by-step guideHow to sign in to the Bizkaia Tax Office online portal
Digital certificate, B@kQ and other ways to sign in.
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