Hi was wondering if anyone knows how we go about this. Me and my partner have decided to live together and he's just been full custody of his 2 other children and stepchild through social work. I currently have 2 children....the youngest is with my partner. How do we claim together and will we make a joint claim for child benefit. He has still to make cb claim as his ex is still getting it. He works full time also. Could anyone help thanks in advance x