I made changes to my tax return and have not received a new tax decision yet. The original due date for my back taxes is approaching soon. Do I have to pay them?

No. Wait for a new tax decision with a new due date and instructions for payment. You can check in MyTax whether your tax assessment process is still ongoing. You will receive the new decision by post or, if you have activated suomi.fi messages, in MyTax only. You will receive an email notification when the decision arrives in MyTax.