No. You can't clear. Just go back into your return and manually change anything you need.
But if you don't mind losing the fee you already paid and to pay for another account, you can set up a new account. Online is only good for 1 return per account. But you can use the same email address for 5 accounts. How to start another return in the Online version
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-onli...
Or call in and ask to be switched to the Desktop program. That has more features and advantages over the online version and can do more than 1 return.
Contact Customer Service
5am-5pm Pacific Time Monday -Friday
https://support.turbotax.intuit.com/contact/
What is the Turbo Tax phone number
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
