Acting on behalf of a company with an official role (e.g. Managing Director, Chair of the Board) may not be possible in MyTax on 21 May 2024 between 10 am and 2 pm due to a maintenance break. However, if you have a Suomi.fi authorisation (e.g. Managing tax matters), you can act on behalf of a company. We apologise for any inconvenience.

MyTax

Take care of your tax matters in MyTax. Log in with your online banking codes, a mobile certificate or the Finnish Authenticator app.

Give up paper letters. Request to receive mail from authorities in electronic format only

Topical issues

Maintenance breaks and disruptions affecting the Tax Administration’s services

Instructions

If you use the service on behalf of someone else, you may need a Suomi.fi authorisation

The pre-completed tax return – instructions for filing

How to submit a bank account number

MyTax instructions for tax cards

Instructions for using MyTax

Frequently Asked Questions