When you log in to MyTax, your tax-related letters will change from paper to electronic form automatically. Read more about the changes.
Tax relief can only be granted in exceptional circumstances. Relief can be granted on taxes and late-payment charges, either on the entire amount or just part of the amount.
Choose your filing method
Send completed form to:
Finnish Tax Administration — Verohallinto
Tax Collection Unit
P.O. Box 6002
FI-00052 VERO
Download the form
Instructions
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The online authorisation mandate
You can use the Suomi.fi authorisation to enable you to deal with taxes for another person – including legal persons, companies, other entities – 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 written in the name of a company or another person, to manage a single tax-related issue. If you – either personally or for an organisation that had been authorised – submit tax-related information on paper, a copy of the letter of authorisation has to be enclosed. A letter of authorisation does not provide access to MyTax.
Letter of authorisation for tax representation of individual taxpayers (3818)
Power of attorney for managing the taxes of a company (3804)
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Key terms:
Page last updated 7/29/2026