Can I get a copy of entire payment history and a complete copy of my file

An attorney can probably help you get a copy of your entire payment history but I'm not sure what you mean by "complete copy of your file". Who is maintaining this file that you're talking about. If you're talking about the court file you should be able to get a complete copy of the court file (you'll have to pay the copy costs to the clerk) but if you're talking about child support enforcement's internal file, you are not entitled to a copy of that. You should definitely talk to a local attorney who can help you navigate this situation and get your payments straightened out.  To answer your last question: No, you dont need a lawyer to get a complete copy of your entire file, if you know what to do to get it on your own.  If you don't know how to get it on your own, then, yes, you will need an attorney to help with that.