When you log in to MyTax, your tax-related letters will change from paper to electronic form automatically. Read more about the changes.
Report your income from renting out an apartment in MyTax if possible. If you cannot use MyTax you can send a paper form or give out a letter of authorisation to have another person deal with tax reporting for you.
There is no need for you to include information on the profit/loss of your rental operation for the year because the Tax Administration will perform the calculations for arriving at the correct economic result. If you co-own a rental property, you only need to report your share of the rental income and any associated costs (this may be the case if you and your husband/wife are co-owners).
Choose how to submit
The pre-completed tax return - instructions for filing
Note that there are no numbered forms, such as Form 7H, in MyTax. Claim a credit for rental income on your tax return or tax card request.
Download the form
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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.
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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
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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.
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Other forms related to rental income
Rental income, real estate – Form 7K.
Rental income from farmlands, woodlands, forest and other rental property – Form 7L.
Key terms:
Page last updated 4/2/2026