You must complete and include Form 301 with the appropriate individual credit form(s) (any form that starts with 3) with your return. Line 49 – Dependent tax credit.Yes, you must report the overpayment applied as a credit the same way you would report a refund. A. The Tax Collector may authorize either credits or payments of refunds for any taxes, penalties or interest paid in excess of the amount actually due. Learn how overpayments are determined, how you're notified, types of overpayments and more. Learn about overpayments and overpayment materials.