How did you install it the first time? Did you use the CD or use the download method?
If you bought the download directly from Turbo Tax,
Access your downloads here
https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
How to download your software purchase
https://ttlc.intuit.com/community/installing/help/how-do-i-download-the-software-i-purchased-at-turb...
But your tax return was only saved on the original computer so if you don't have a backup of the pdf file or data file ending in .tax2023, your return is gone.
