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Information and guidance on MyTax

MyTax is the Tax Administration’s e-service for taxpayers. You can use MyTax to take care of your own tax matters or those of your company or your underaged children.

If you have a Suomi.fi authorisation, you can use MyTax for the tax matters of another person, company or organisation. In addition, some features are available without a Suomi.fi authorisation.

  • 1

    Log in to MyTax

  • You can use different identification methods

    You need personal online banking codes, a mobile certificate, or other such identification method to log in. How to log in to MyTax

  • 2

    Select whose tax matters you are taking care of

  • My tax matters

    If you want to take care of your personal tax matters, select My tax matters.

  • Another person’s tax matters

    If you want to take care of someone else’s tax matters, select Act on behalf of someone else.

    • If you have a child who is under 18, you are automatically authorised to take care of their tax matters in MyTax.
    • If you have been granted a continuing power of attorney and it has been confirmed, and if there are no other attorneys, and if your right to manage financial or other affairs is not limited, you are automatically authorised to manage the granter’s affairs. However, you cannot submit a bank account number.
    • In other circumstances, you will need a Suomi.fi authorisation
  • Company’s tax matters

    If you are taking care of your company’s or corporation’s tax matters, select Act on behalf of a company.

  • Reporting and requesting information in a limited scope

    If you are reporting or requesting information for certain personal tax matters, or if your job requires you to report or request information in a one-time capacity for another person, company or organisation, select Report or request information in a limited scope.

    • If you are a non-resident taxpayer and you log in to MyTax with eIDAS identification, you can use this functionality to request a refund of tax at source, for example.
    • This functionality can also be used by parties such as lawyers submitting deeds of estate inventory, representatives of a bank or company submitting annual information returns, or securities brokers filing transfer tax returns.
    • Read more about reporting and requesting information in a limited scope
  • 3

    Manage your tax matters

  • 4

    Ask for help if needed

Our service agents can access your information

When our service agents assist you on the phone in how to use the service, they can see your information in MyTax. Unfinished information will not be used in your tax assessment.
We will store your activities in MyTax so that we can investigate any faults or malfunction that may occur in the service. We will destroy the recordings after 30 days.

Non-disclosure order limits access

If you have a non-disclosure order for personal safety reasons, MyTax shows the information covered by the order both to you and your authorised agent. At the Tax Administration, only named employees have access to the information.

In exceptional cases, our service agent may see your contact details in a recording. The service agents are Tax Administration employees and bound by confidentiality.

Frequently asked questions

You can use MyTax on a computer or a mobile device, such as a tablet or a smartphone. You will also need internet access and a web browser. Make sure cookies and JavaScript are enabled.

For the best MyTax user experience, use the latest version of any of the most common browser software:

  • Microsoft Edge
  • Google Chrome
  • Apple Safari
  • Mozilla Firefox.

Logging in to MyTax using Suomi.fi e-identification on older browsers and operating systems has been technically blocked. Read more on the website of the Digital and Population Data Services Agency.

To take care of the tax matters of your underage child, log in to MyTax and select “Act on behalf of someone else”.  

Exceptions:  

  • If a child has a non-disclosure order for personal safety reasons, their guardians cannot act on their behalf. 
  • If all the guardians of a child have a non-disclosure order for personal safety reasons, none of them can act on behalf of the child. 
  • If only one of the guardians has a non-disclosure order for personal safety reasons, only the guardian with the non-disclosure order can act on behalf of the child.

These terms are in place to protect information covered by non-disclosure.  

If none of the guardians can act on behalf of the child, a separate Suomi.fi authorisation is needed, and each guardian must accept the authorisation. The person with the Suomi.fi authorisation can then act on behalf of the child. To grant and accept an authorisation to manage tax matters, you need to go to the Suomi.fi e-authorisation service. How to grant a Suomi.fi authorisation for tax matters 

If the child has personal online banking codes, they can use MyTax themselves. 

Tax card for minors 

Read the instructions on how to request a tax card for a minor in MyTax 

MyTax uses Eastern European Time (Helsinki, Finland).

Page last updated 5/21/2024