TurboTax accounts cannot be deleted. If you are not using the old account, just abandon it. Nothing will happen. No one can access it. If a return you prepared using that account is stored there, keep a record of how to get to it---write down the account and user ID somewhere "just in case" you need it someday.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
