Do not click on anything that says "amend". You do not amend a return that has never been filed in the first place. You need to follow the instructions in the link, then print, sign, and mail your 2016 return. You cannot e-file it.
To finish a prior year return started in TT online:https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb