You need to find a full computer. Maybe ask a friend or family. Or go to an accountant or do the amended return by hand.
2016 1040X Amended return
https://www.irs.gov/pub/irs-prior/f1040x--2016.pdf
2016 1040X Instructions
https://www.irs.gov/pub/irs-prior/i1040x--2016.pdf
