Without knowing what you need, here is the TurboTax website for prior tax years (2014 thru 2016) where you can purchase a download for each tax year - https://turbotax.intuit.com/personal-taxes/past-years-products/
Prior year tax returns can only be printed and mailed, they cannot be e-filed.
TurboTax software can also be purchased from a reputable online retailer, such as Amazon. TurboTax does not support tax years prior to 2014.
The TurboTax desktop CD/Download editions for 2017 are on this website - https://turbotax.intuit.com/personal-taxes/cd-download/
