The TurboTax 2015 online editions were shut down after November 15 to make way for the 2016 online editions.
Access to the 2015 tax returns that were started using the online editions will probably be available during the first full week of December after the 2016 online editions are released.
Once the 2015 online returns again become available follow this TurboTax support FAQ for completing the 2015 return - https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb...
The TurboTax 2015 online editions were shut down after November 15 to make way for the 2016 online editions.
Access to the 2015 tax returns that were started using the online editions will probably be available during the first full week of December after the 2016 online editions are released.
Once the 2015 online returns again become available follow this TurboTax support FAQ for completing the 2015 return - https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb...
So there's nothing I can do to finish my return right now except for start over?
Once the 2016 online editions become available you can download the 2015 tax data file from the 2015 Timeline and complete the return using the desktop editions. Assuming that you used the Free edition of TurboTax for 2015 then just follow the procedure in the TurboTax support FAQ posted in the answer above.
However, if you do not want to wait till next month then you would have to start over with the 2015 return using the 2015 desktop editions which you can purchase and download from this website - <a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/personal-taxes/past-years-products/">https://turbotax.intuit.com/personal-taxes/past-years-products/</a>