I received a corrected W2 form from my employer I had already filed my return

[chessa33]

It states on my corrected one no Federal Income was withheld but the original said it had been

[Mike9241]

Wait, the IRS may catch this, or your return may be rejected. If rejected, you can fix it by changing the withholding and in the e-file section of the w-2 check that it is a corrected. Then resubmit. If your return is processed as is, you have to file an amended return

[ThomasM125]

You have to look at your pay stubs to see if the tax had actually been withheld. If so, your employer should reimburse you for the federal tax withheld. If the IRS processes your return as you filed it, with the tax reported as withheld, then you will need to file an amended return to reflect the corrected W-2 form. Also, if you don't file the amended return the IRS will send you a letter eventually requesting the missing tax that may include penalties and interest.