To make changes to an e-filed return that has either been accepted by the government or a paper return that has already been mailed, you'll need to amend. You cannot amend an e-filed return that's in pending or rejected status.
Please refer to the steps below to complete the amendment process through TurboTax. You must submit amended returns by mail - they cannot be e-filed.
https://ttlc.intuit.com/replies/3288565
