If you used Online TurboTax to prepare a 2016 return, but now when you log in you find no evidence of the 2016 return in the 2016 Tax Timeline, and it's acting like it wants you to start one, then you likely have multiple accounts and signed into the wrong one.
o
get a list of your User IDs and recover account access, you can use the
tool at the link below. Try using your phone number first.
NOTE: Before running the
account recovery tool below, log out of all Intuit accounts including
this user forum, or you might end up in a loop. Then clear your browser
Internet cache, close your browser, then reopen it, and go to the link
below. You may wish to copy this link so you can paste it into the new browser session.
https://myturbotax.intuit.com/account-recovery
If
still no luck after running that on your phone number, User ID, or email
address, then run the tool yet again, but this time choose the
small blue link that says "Try something else", and it will look you up by SSN and other parameters.