It might change or lower the amount you owe, it's definitely worth a try!
Follow these steps to file an amended return:
If you have already filed your return, first print out a copy
of your original return for your records.
Then go into Turbo Tax and click Amend (change) a filed and
accepted return under Manage Your Return.
It's zeroed out (which is why you need to keep a copy of your original
return). You can then add any additional info that you've received, and
Turbo Tax walks you through the rest!
Addresses
to Mail Amendments To
You need to wait till your return is accepted by the IRS before
you amend.
You mail the 1040X along with any schedules that changed as a result
of the amendment (except the 1040).
You also include the federal copy of any new W-2s or any 1099-Rs that
had tax withheld.
