You can create a revised tax card in the MyTax service.

When updating your tax card, please make sure that it is issued for wages and salaries. Omapaja pays your income as wages, so we cannot use a tax card issued for pension income or non-wage compensation.

We receive your revised tax card automatically with the latest details when calculating your wage payment. You no longer need to send your revised tax card to us separately.

You can find the Finnish Tax Administration’s instructions here:

Tax card for wages and salaries
https://www.vero.fi/en/individuals/tax-cards-and-tax-returns/tax_card/wage-earners/

Request a new tax card
https://www.vero.fi/en/individuals/tax-cards-and-tax-returns/tax_card/request-a-new-tax-card/

MyTax
https://www.vero.fi/en/e-file/mytax/

Tip: In MyTax, choose a tax card for wages and salaries — not for pension income or trade income.

How to change your tax card