Self-assessed tax return (4001)
You can file and pay self-assessed taxes (such as value-added tax or lottery tax) in MyTax.
Tax returns on self-assessed taxes must be filed electronically. Filing on paper is allowed only in exceptional cases.
You can submit the information electronically, for example:
- via an API
- by uploading a file to the Ilmoitin.fi e-service.
New version of the paper form from 1 January 2025 onwards
- When you file information regarding VAT or other self-assessed taxes for tax periods that end no later than on 31 December 2024, use the form for year 2024. For example, use the form if you request a VAT relief for small businesses for year 2024.
- When you file information regarding VAT or other self-assessed taxes for tax period 1/2025 or later, use the form for year 2025.
Read more: Rates of VAT
Note: Although excise duties are self-assessed taxes, they are not filed on Form 4001. Read the instructions for filing and paying excise duty.
Download the form
Instructions
Key terms:
The Tax Administration can use automated decision-making in the context of resolving tax matters. This means that a decision concerning your tax matter may be based on partial or full use of an automated decision-making system. Read more about automated decision-making at the Tax Administration (only in finnish).