I've come across a few cases recently of 2023 Form11 Income Tax returns being drafted for filing now (late, I know) , with a refund due, but also a surcharge calculated (seems to be for late filing) as part of the overall net amount. I have never seen a surcharge calculated on a tax return that has a refund. In some cases, it turns the refund into a payable amount. I've asked 3 different people in Revenue why this is appearing, especially as the amount is not a obvious percentage (eg 5% or 10%) of any amount on the form - they didn't know why. I have also submitted a query via MyEnquiries a few days ago, and am awaiting a reply. But for now I'm wondering if anyone else here has come across this, as it's new to me?