If you need to recover your TurboTax Online 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://ttlc.intuit.com/replies/3300041
Once you are inside your account, to
access your prior year return, you would need to upgrade your account. The
following TurboTax FAQ explains how to access your 2017 return.
https://ttlc.intuit.com/replies/5574744
