If your employer will not correct your Form W2 even after you contacted them and request a correction, you can contact the IRS and start a Form W2 complaint. You can call them at 800-829-1040 or set up an appointment to visit an IRS taxpayer assistance center (TAC).
The IRS will send your employer a letter requesting that they issue you a corrected W2 within ten days. they will also send you a letter with information on how to complete Form 4852, Substitute for Form W-2, Wage and Tax Statement. You can use this form in case your employer does not correct and issue you a corrected W2.
Please reach back if you have additional questions.
