What should I include on my waiver request? Filing an amended return reflecting an overpayment due the taxpayer.To avoid collections, you must repay your overpayment balance in full. If you cannot repay the balance in full, you may enter into a payment agreement with DES. Payments sent electronically from your financial institution may take up to four business days after the date you authorized payment. To designate part of your overpayment to the N.C. Education. Endowment Fund, see the instructions for Line 31 on Page 15. Over 300 CMS employees will receive a smaller paycheck due to an overpayment from June. How do I apply for Child Support Services? You can complete the application at your local CSS office or apply online.