Yes, you will have to.
The TurboTax online editions
are only for tax year 2017.
To complete a 2016 tax return using
TurboTax you will need to purchase and download one of the 2016 desktop
editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2016 tax return can only be
printed and mailed, it cannot be e-filed.
From
<https://ttlc.intuit.com/questions/4174948-how-do-i-file-my-taxes-as-2016-not-2017>
