Need to file a claim? Download the Wage Claim Form.Employees or former employees who discover an overpayment of compensation must report it immediately to their supervisor. If you are expecting to report an overpayment it must be indicated in the "RV" record. The salary overpayment resulted because . Employers with 25 or more W2 forms to submit with the MW508 return must file electronically as described on the next page. This chapter deals with state law provisions identifying, establishing, and collecting overpayments. All states have provisions addressing these matters.