I'm PAYE. A couple of years ago I moved I had to complete a self assessment to pay back some child credit as I'd moved in to a different wage bracket. All done. Then, I received a letter 6 months ago saying I hadn't completed a self assessment and was being fined. I'm PAYE so don't do SA. I called HMRC and they sent me a letter confirming I don't know anything. But the letters keep coming. Today received one saying I now owe £1,200. I'm clearly stuck in a system. I know I don't owe this because I have a letter from HMRC to prove it but the letters are really stressful. What can I do to get them to stop sending me these? Help!