If you are an operator of trade or business (T:mi), an agricultural/forestry operator, select Manage your tax matters in MyTax. When you start with Manage your tax matters, you can access all your tax affairs. Read more: New in MyTax
My additional prepayment’s due due date is 7 February 2026. Can I send the payment already in January without having to pay interest?
Unfortunately, you cannot. If the due date is a February date, it means that you must pay late-payment interest with relief for the February days. Read more about the late-payment interest with relief.