Well you know how I found our child tax credit was based on the wrong income ammout for myself, so I called up and corrected it and they works out I was owed a grand and my weekly payments went up. Well I had a letter come through today saying what the anual income our current benefit is based on, and if it was going to be differnt for the next tax year to let them know. Well, the amount they have based it on is wrong! By about Â£4k anually, which I know isnt much but I think it puts us under a differnt bracket which means my payments would go down. I dont know whether to contact them and tell them this is wrong of not, cause I dont know how much this will effect my payments. Do I just wait till the new tax year and let them decrease my payments? which would be easier for me to manage. Or if I tell them now will they demand the money back? or just lower my payments??