The TurboTax online editions are only for tax year 2017.
To complete and file prior year tax returns (2014 thru 2016) you will need to purchase and download each tax year desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
Prior year tax returns can only be printed and mailed, they cannot be e-filed
When mailing multiple tax years use a separate envelope for each tax year.
