Yes, as long as you have not paid for TurboTax and have not filed your tax return, you can delete
your entries and start fresh.
Follow these
instructions to clear and start over:
https://ttlc.intuit.com/replies/4248526
If you have paid for TurboTax, you will need to go through the interview process from the beginning and change your answers as needed.
If you have already filed your return, you will need to wait until the IRS has processed your return, then file an amended return. For more info, see: How to Amend (Change or
Correct) a Return You Already Filed