Go to this TurboTax website to purchase a download of the Business Edition for tax years 2013 thru 2015 - https://turbotax.intuit.com/personal-taxes/past-years-products/
Go to this TurboTax website for the 2016 Business Edition - https://turbotax.intuit.com/small-business-taxes/
Despite the date this post is several years old ... years prior to 2015 are no longer supported ... you will need to either use a paid tax pro OR get the forms from the IRS/state to manually fill them in. And the 2015 program will not be supported for much past 10/15/19 so if you are going to get it do so fast.
Even if you did get those CDs to the other person they will not install or update so they are useless ... and according to the licensing agreement you are not allowed to sell the prior year programs.
Sorry, they only sell the last 3 years. So only back to 2016. Even if you can find an older version you won't be able to update the program or download any state programs for it.
Get them on Ebay,
I just went through that problem a few weeks ago, I needed to file 2003 1041s and the only option was Ebay .
buying used software is daunting but I came through ok
You can access 2016 Business by using this link https://turbotax.intuit.com/personal-taxes/past-years-products/2016 however we no longer support the filing of 2015 or earlier; the FAQ below will provide you with some alternate routes:
@gilbertwiebe Tax returns prepared in the TurboTax CD/Download software are stored locally on your computer or storage device, even if you e-filed. Unlike TurboTax Online, we don't maintain returns prepared in the TurboTax CD/Download software on our secure servers. If you do not have a copy, you can get a copy from the IRS, by following the instructions in the link below:
Sorry they only sell the last 3 years so only 2016, 2017 & 2018. Even if you found old years on the internet or somewhere you wouldn't be able to update the program or buy any state programs you need. You would need to go to a local accountant or tax place to prepare old returns.