You must use the CD/download product to prepare and file prior year tax returns. The software is available for 2016,2017, and 2018. Each year must be purchased separately. Prior year returns must be printed and mailed. They can't be efiled. See here: https://turbotax.intuit.com/personal-taxes/past-years-products/
For years prior to 2016, you would have to find a paid preparer with software that old or you could download the forms from the IRS web site and complete them by hand.
https://www.irs.gov/forms-pubs/prior-year
