As long as you haven't submitted payment, deducted the TurboTax fee from your refund, or registered, you can erase your return and start from scratch in TurboTax Online. Please click the TurboTax Help link, listed below, to learn how to clear and start over.
https://ttlc.intuit.com/questions/2586254-how-do-i-clear-and-start-over-in-turbotax-online
If you need specialized help with your return, you can try TurboTax Live,
Please click the TurboTax Help link, listed below, to learn more about using TurboTax Live.
https://ttlc.intuit.com/community/expert-review/help/how-do-i-connect-with-a-tax-expert-in-turbotax-live/00/27282