Can I pay my back taxes in one instalment?

Yes, you can pay both instalments at once. Both instalments have the same reference number, so you can pay their sum total in one single payment. This reference number is the same for all of your income taxes. You can see your personal reference number on the bank transfer forms or in MyTax. When you use this reference number, remember that it is a shared reference number for all income taxes, including prepayments. This means that when you send us a payment with this reference number, we will use it on your first upcoming income tax.