Did you use the disc Desktop program to do 2015? Then your return is only on your computer. Or did you use the Online web version?
Do you need the 2015 program download to open your return?
Contact Customer Service
5am-5pm Pacific Time (8-8 Eastern) Every Day until Oct 25, 2019
And until 9pm (12 midnight Eastern) on Tue 10/15/19
https://support.turbotax.intuit.com/contact/
How to Amend all years
https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-...
