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.
Attention begins.
Form for the 2026 year: this form is for the reportable tax period 1/2026 and later periods.
Form for 2025: Use this form if you have amounts and information to report for any tax period relating to the past year 2025.
Form for 2024:
- Use this form if you have amounts and information to report for any tax periods that end no later than on 31 December 2024.
- For example, you should use the 2024 form for submitting an application for VAT relief concerning the 2024 year.
Attention ends
Read more:
New VAT rate from 1 September 2024, instructions for VAT reporting
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
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).