If you were notified about a tax-related message, it is probably about a due date approaching. You do not need to take any action if you have paid your taxes or if you are going to pay them by their due dates.
When you sell assets, such as an apartment, a real estate unit or shares of a non-listed company (i.e. other than a company listed on a stock exchange), primarily submit details on capital gain or capital loss in MyTax. If you cannot use MyTax, you can use a paper form or authorise another person to act on your behalf.
Choose your filing method
Please note that MyTax does not contain numbered forms such as Form 9.
- If you are reporting a capital gain or claim a capital loss for last year, enter the details on your pre-completed tax return.
- If you are reporting a capital gain or claim a capital loss for the current year, include the claim in your tax card request.
Send the form back to the address printed on it.
Download the form
Instructions
Attention section starts
The online authorisation mandate
You can use the feature called “Suomi.fi Authorization” to enable you to deal with another person’s taxes through e-services, over the telephone, or by visiting a service point on their behalf.
Attention section ends
Attention section starts
Letters of authorisation on paper
You can receive a letter of authorisation from the other person. It will enable you to deal with that person’s taxes on the telephone, by visiting a service point on their behalf, or by submitting information on paper tax forms. To have a letter of authorisation (often called a ‘power of attorney’) does not provide access to MyTax.
Letter of authorisation for tax representation of individual taxpayers (3818)
Attention section ends
Attention section starts
When is there no need for an authorisation mandate?
The following circumstances are examples of when you can deal with someone else’s taxes with no authorisation.
You have child younger than 18 and you handle the child’s taxes
You are automatically authorised to access MyTax for the child, without an authorisation. Log in to MyTax and select “Act on behalf of someone else”.
Read more about this subject on Suomi.fi
You are a guardian
You do not need a Suomi.fi authorisation when your continuing power of attorney for being a guardian is officially confirmed, or when you are registered as a private guardian. Log in to MyTax and select “Act on behalf of someone else”.
Note: If you are a public guardian, in other words, a public official employed by a public guardianship office, you can only use paper forms.
Attention section ends
Page last updated 11/18/2024