The TurboTax online editions can only be used for one tax return per account and User ID. If another tax return is completed using the same account then the first tax return is deleted and cannot be recovered.
If you want to start another tax return using the online editions you will need to create a new account with a new User ID.
Go to this TurboTax website and click on Sign up to start a new account - https://turbotax.intuit.com/personal-taxes/online/file-your-own-taxes/
