Use Form W-2C to correct errors on Forms W-2, W-2AS, W-2GU, W-2CM, W-2VI, or Form W-2c filed with the SSA. Also use Form W-2c to provide corrected Forms W-2, W-2AS, W-2GU, W-2CM, W-2VI, or Form W-2c to employees.
Corrections reported on Form W-2c may require you to file Form 941c, Supporting Statement to Correct Information. See the Form 941c instructions for more information