Businesses and corporations

Value added tax

If your company is in the VAT register, remember to file VAT returns regularly even if you have not had any business activities. 

Katso identification will be taken out of use

Katso IDs and Katso authorisations are no longer valid after 31 August 2021. If you use electronic services to take care of a company’s or an organisation’s tax matters, start using authorisations.

Corporate income tax returns

An extension of time to submit the income tax return has been given to corporate entities that ended their accounting year in December 2020. Their income tax returns must be filed by 31 May 2021.

Important Dates and Deadlines

12.4. Due date for VAT and other self-assessed taxes

23.4. Due date for prepayments of income tax

Corona situation

Instructions for companies in the corona situation.

Business in Finland

Are you bringing your business operations to Finland? Your tax liabilities in Finland will depend on your company type and the scope of your operations.