20 C.F.R. § 404.1271
(b) Overpayment due to overreporting of wages—(1) Report to file. If the overpayment is due to the State's reporting more than the correct amount of wages paid to one or more employees during a reporting period and the overpayment is not adjusted under paragraph (a) of this section, the State shall file a report on the appropriate form showing:
(2) Refund or credit of overpayment where section 218(e)(2) of the Act not applicable. If:
(c) Refund or credit of overpayment where section 218(e)(2) of the Act applicable—(1) General. If—
(ii) The overreporting is due to a failure to compute § 404.1256,
the State shall adjust the overpayment under paragraph (b)(1) of this section. An overpayment due to overreported wages which does not result from the computation of contributions or a failure to compute contributions under § 404.1256 shall also be adjusted by the State under paragraph (b)(1) of this section. If the adjustment of the overpayment results in an underreporting of wages for any employee by the State or any political subdivision, the State shall include with the report adjusting the overpayment a report adjusting each underreporting. If the adjustment of the overpayment does not result in an underreporting of wages for any employee by the State or any political subdivision, the State shall include with the report adjusting the overpayment a statement that the adjustment of the overpayment does not result in any underreporting.
(2) Amount of refund or credit. If the State collects excess contributions from employees, the State's claim for refund or credit is limited to the overpaid amounts. (See § 404.1275 relating to adjustment of employee contributions.) If—
(ii) The State collects excess contributions from employees but Forms W-2 have not been issued for an amount of wages which is being adjusted downward, the State may claim a refund or credit for the overpaid amounts. Where the State's claim for refund or credit is for the total overpaid amount, the adjustment report shall include a statement that excess contributions have not been collected from employees, or, where excess contributions have been collected, that Forms W-2 have not been issued and that, when issued, they will show the correct amount of employee contributions.
(Approved by the Office of Management and Budget under control number 0960-0425)
[53 FR 32976, Aug. 29, 1988, as amended at 66 FR 28836, May 25, 2001]