You can contact TurboTax support, they should be able to give you a download of your Desktop software if they see you purchased it from TurboTax.  

TurboTax support

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

If you purchased the Desktop software from TurboTax, there should be a download of your software in your Downloads.

How to download TurboTax Desktop software from TurboTax.com

https://ttlc.intuit.com/community/installing/help/how-do-i-download-the-software-i-purchased-at-turb...