2016 e-filing

[cidepip504]

IRS just stated they are excepting 2016 returns for refunds 

How can I e-file 

[TAXOH]

Only 2017, 2018 and 2019 can be electronically filed.  2016 would need to be mailed in.

[George4Tacks]

You need to start up your DeLorean and travel back one year. IRS accepts returns for the current filing year (2019) and two prior years (2017 & 2018)

https://www.irs.gov/e-file-providers/benefits-of-1040-modernized-e-file