If it's deducted from your pay you should be able to get a total from your employer or payroll dept where you work. I kept receipts and wrote checks in the beginning then estimated some on my tax return. If your question is for a tax return I would ask H&R or IRS by phone if it would even be worth the footwork before beginning. Hope this helps.
Yes, your employer should be able to give you an amount if it is deducted from your check. If not, you could probably get a copy of canceled checks from your bank.
Csa who take the payments local magistrates court if order is through them or wage slips