Claim for adjustment of income tax
In Finland you can claim adjustment within three years from the beginning of the tax year starting after the relevant tax year.
If the last date of the year is a Saturday or Sunday, the deadline is the following workday.
You can request for the suspension of enforcement when you claim for adjustment.
Due dates for making a claim for adjustment by tax year
| Tax year | The claim for adjustment shall be delivered by: |
| 2021 | 31 December 2024 |
| 2022 | 31 December 2025 |
| 2023 | 31 December 2026 |