Tax prepayment - companies and organisations
Taxpayers are expected to make advance payments on their projected income, to be derived from the operation of a trade or business, agriculture or other activity in order to generate income, including rental operations and receipts of capital gains.
For precise information (in Finnish and Swedish) about prepayments:
It is recommended that taxpayers carefully examine their tax prepayment calculations. If the calculation shows a projected income amount that is different from currently projected income, taxpayers are entitled to request for changed prepayments. In some situations, the Tax Administration will initiate changes in prepayment calculations.