Are you using Online TurboTax, and did you start an amended return by accident, but haven't actually mailed it? If so, see this FAQ on how to cancel/undo:
https://ttlc.intuit.com/community/amending/help/how-do-i-cancel-or-undo-an-amended-return-in-turbota...
Then you'll need to go back and reverse any changes you made.
