It is possible you may have used a different account. You can use this link https://myturbotax.intuit.com/account-recovery/ to recover your account with your phone number. If that doesn't work there is a small blue link at the bottom that says Try something else and if you click on that you can locate your account by using your SSN, name, and birthdate.
If you still can't access your account, you can contact TurboTax Support for assistance by following this link https://support.turbotax.intuit.com/contact/.