If you didn't submit your 2016 taxes, your incomplete work was
cleared when 2017 software launched. You would need the software to prepare and
file your 2016 taxes at this point.
TurboTax software for tax years 2014, 2015 and 2016 can
be purchased at our Past
Years' Product page. Please keep in mind
that TurboTax Online and mobile products are only available for the current tax
year. Prior year returns must be mailed.
You are also able to download the Forms and Instructions
free from the IRS web site at this link: https://www.irs.gov/forms-pubs/prior-year