
Quoting
CourtClerk
Who is enforcing the order? If DCSS is, it'll take a while to get a wage assignment to your employer. In the meantime, make your payments directly to them (send them to the State Disbursement Unit - you can pay it online) or drop it off at your local child support office.
They don't modify arrears to go further than the effective date of the modification. In other words, if you have been overpaying your support for a year and you waited to file for modification, then you're stuck with that year of overpayments.