You can simply abandon the TurboTax account. If you'd like to delete any data entries you've made, you can use the "Clear and Start Over" feature. See the instructions below.
https://ttlc.intuit.com/replies/4248526
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***