If you have already e-filed and realize that there was an error on your return, you can file an amended return and file it again. You can do this in Turbo Tax.
To start your amended return, go back into TurboTax, open the return that you already sent in, and on the first page you see, click on the link to amend your return. Remember before you amend: amend only if you need to make a change on a return you have already filed. Wait until you got your refund or paid your taxes.
Use Form 1040X to amend a federal income tax return that you previously filed. Make sure you check the box at the top of the form that shows which year you are amending. Since you can't e-file an amended return, you'll need to file your Form 1040X on paper and mail it to the IRS.
