TurboTax no longer sells or supports any year prior to 2018 since those years are closed for refunds. Even if you could find the software you would not be able to update it and the software without updates is useless.
You can download prior years forms from the IRS website and do it by hand - the old fashion way.
https://apps.irs.gov/app/picklist/list/priorFormPublication.html
Since you have several years I suggest going to a tax professional.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
