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 yearThe claim for adjustment shall be delivered by:
202131 December 2024
202231 December 2025
202331 December 2026