You have the option to file your return with the issued W2 if not resolved by the deadline.
You would then file an amendment after the IRS has accepted and processed your return. It is important to wait for the return to be completely processed before filing an amendment.
For the amendment, you will need the corrected W2 or a Form 4852, Substitute for Form W2. The IRS should send you that form which allows you to file using your final paystub.
If you file your return with your “correct” account, the IRS could dispute your return based upon the W2 the IRS has on record. The IRS may insist through a letter or notice that you pay your taxes based on the original W2. Letters and Notices have deadlines for responses that may not give you enough time to correct the incorrect W2.
