Efiling through TurboTax ended October 17, 2016 this year, except those who had rejections had an extra 5 days.
If you started an Online return, you can download the *.tax2015 data file and finish it in 2015 desktop software (CD/download). If you already paid for the 2015 return, TurboTax Support will furnish you the 2015 software as a download.
