How to file a w-2c to current filing

[Bsch4477]

If you have not already filed replace the information in your original W-2 with your corrected W-2. If your return has already been accepted and the corrected W-2 would change your tax liability amend your return. 

[MindyB]

As @Bsch4477 mentions, if you have not yet filed you can replace the information in the W-2 section, and if you have filed, you'll need to amend your return to make any changes. For more information, see: How do I amend my federal tax return for this year?

You will enter this exactly as a normal W-2.  Except, once you are finished, the system will show a page called Let's check for uncommon situations. Check the box for W-2 was corrected by my employer (Form W-2C).