Yes, you can uses your email address, phone number or user ID.
Here's how to view a list of your Intuit accounts:
If you have multiple TurboTax accounts, pick one and stick with it when you do future tax returns. That way we can automatically transfer your tax info over year after year. It also makes accessing your prior-year returns much easier.
Related Information:
While signed in to your account, you will find the "sign out" option on the lower left hand corner of the screen.