We don't live together so by their criteria we are both single parents. DD is always with me currently as i'm on maternity leave, and we spend just over half the week at mine, and the rest at his house. When I return to work we're planning on using a childminder and spending most of the week at his house and weekends at mine for convenience. The form says the main person responsible for dd's care should apply - AIBU to want him to claim as he earns less and we'll get about £7000 more p/a including childcare component? I should clarify he is also dd's biological dad.