If I don't finish my payments before my release date will I go to jail

Depends on the terms of your probation agreement

All I know is I was on yta probation for 18 months I finished all my community service I'm on telephone reporting I'm scheduled off next month. But all my money is not paid off

They may violate your probation, or they may also make you stay on probation longer.

Have you asked your PO for an extension of time on your probation to let you finish paying off your fine? The judge will not automatically grant you an extension of probation but will probably violate you and send you to jail. You must ask for the extension way before your time is up. It is usually at least 3-4 months before your time is up.