You cannot change a return to indicate that it is an amended return (Form 1040X). You must follow the directions in this TurboTax FAQ to file an amended return. The amount of additional refund you will receive on your amended return depends on the amount of tax liability you had on your original return. When you file your amended return the result will be the amount of refund you can expect to receive.
Note: You should wait until your original return has been processed to file an amended return and you must mail the amendment.
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