MyTax is the Tax Administration’s e-service, where you can take care of most of your tax matters.
You can log in to MyTax with your online banking codes, a mobile certificate, or a Katso ID. If you wish to act on behalf of someone else, you will need authorisation. Read more about authorisations
If you submitted your tax return on paper or submitted it electronically by some other method, the information will later be available in MyTax.