If you filed a 2016 tax return and then changed it before it was accepted or rejected, your original return is still being held until the IRS starts accepting returns on Jan. 23 and nothing has been changed on it. You cannot change an efiled return unless it is rejected by the IRS. If it is accepted, you must wait until TurboTax releases the amended tax form 1040X in mid February before you can begin the amending process. An amended return must be printed and mailed. It cannot be efiled.