Hi can anyone help me understand. I kept on claiming child benefit post the rules that anyone earning over 40k should stop or do a self assessment. I did a self assessment 3 years ago and had to pay 2k but then asked them to claim it through tax code. Shortly after my tax code changed and my personal tax allowance went down from 10k to 3k - so thought I was covered. Did not fill one out last year. No chase up. This year got the reminder and did one - now being chased up for 2k as it didn't give me the option of claiming through tax code, got my change of tax code again. Personal tax free amount is 1000 more but think this is a general change happening to everyone. Am I paying too much tax if i pay this other 2k? What does claiming child benefit from tax code actually mean?