She is 16, he 17 and she had a baby a few days ago. Both are at college in relevant education and expect to be for the next 2 years. No one has any health problems. Both live with his mum and dad. His mum and dad both work full time and get CTC for him and his 13 year old brother. He mum was getting CB & CTC for her but this has now stopped.

For the next 15 weeks she can claim IS, CB & CTC, but his mum would no longer be able to get CB and CTC for him (no great loss at this stage, minimum £10 job). Overall they are better off doing this for the 15 weeks

After 15 weeks they would no longer be able to get IS (not in sch 1B) and would only have CB and CTC. Is there anyway at this stage that they can end their CTC claim so that his mum can claim CTC and CB for all of them or are they stuck with the consequences until the end of the tax year?