Hi dont worry about the CSA. What happens is that you give your husbands details to the CSA. They write to him, he will give him his details etc they will figure out an amount he has to pay and then tell you and him. This can take years by the way in my experience. They only take the money from him and deduct from you depending on what benefits you are on. My advice would be get your hours up to 16 per week. You will then not get Income Support but Working Tax and Child Tax instead. Any maintainence from you husband is NOT then taken into account. I have been in this position, went as far as the csa getting an amount but I have never pursued it, me and my ex came to our own arrangement and there has been no need for anything else. But yes go straight to the job centre. They will fast track your claims because you are single parent. Do not worry they are helpful and it is all relatively straightforward. Hope this is clear and helps a bit. Good luck!