Here are TurboTax FAQ links, included below, to help you delete information and deactivate an account if you created one.

How do I deactivate (delete) my TurboTax online account?

How do I delete info I’ve entered into the online edition of TurboTax?

I would like to purchase the downloadable version of Turbo tax 2020.  How do I deactivate the online version that I signed up for in error?

Follow the instructions in this link to deactivate your account:

https://turbotax.community.intuit.ca/community/navigating-turbotax/help/how-do-i-deactivate-delete-m...

I hope this was helpful