You cannot delete an account that was registered so in your email say the notices are spam so you don't have to be bothered with them. If you have not registered the account then you can clear the entries and don't start again but this will not delete the account.
1. While in your TurboTax Online program (after clicking Continue your return)
Select tools.
2. Then click on Clear & start over.
3. On the Are you sure you want to clear your return? pop up screen, if you are sure about clearing all your entries and starting over, click Yes.
4. Then a new screen confirms you have cleared your entries, click Continue.
All of your entries will now be erased.
