how long does it take to get income tax back for child support
HMRC (HM Revenue and Customs) targets. HMRC has a target to process Tax Credit and Child Benefit claims and changes in an average of 22 working days, which is between 4 and 5 weeks. In 2016/17, Child Benefit and Tax Credit claims were being processed within 16 working days on average, which is between 3 and 4 weeks.