Did anyone else get one of these letters from tax credits this week. It is about tax credits overpayments. It says if you have an overpayment from previous years they are going to increase the amount at which you pay it back. And the amount will depend on how much tax credits you get. Anyone have any idea of how much this is changing by? I'm at bit cross about it as we shouldn't have had an overpayment in the first place as we overestimated our income and then didn't notify them of the lesser income in time so it was calculator on the higher about. Our fault but a bit annoying. It's been taken back at quite a low rate until now.