Oh, if you bought the original software as a CD and lost it, you can just phone TurboTax Support, and they will replace it with a download program in your account.

Use the form at this link to be assigned a phone number. The number will not display when they are closed.  This time of year they are open 5AM-9PM Pacific (8AM-12 Midnight Eastern)  7 days/week. 

https://support.turbotax.intuit.com/contact