My employer sent me a corrected W-2 and I already filed my taxes. What do I do? My Social Security was wrong on my old W-2 they sent me.

Keep the updated one for your records. If the social security number was the ONLY thing that was wrong and the IRS already accepted your return, then there is nothing for you to do.  Amending your return would not make a change on the return.  The IRS now has the correct information to match your SSN with the W-2 they have on file.  You already reported the correct numbers, so it would not have any affect on your return.

Reasons to amend a return

File an amended return if there's a change in your:

• Filing status
• Income
• Deductions
• Credits
• Dependents
• Tax liability

You don't need to amend your return if we:

• Let you know that we corrected errors on your return.
• Accept your return without certain forms or schedules or ask you to send them.