You should be able to log into your Intuit online account and download it again. If you can't find it then call support. Do you have a .tax2023 file you need to open? You didn't save your return as a pdf file?
How to contact Turbo Tax
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-contact-turbotax/00/26991
Then after you get the program installed or reinstalled the first thing to do before you open your tax return is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW). Enter some basic information, then go to the state tab and download the state program. Then try to open your existing return, go to FILE - OPEN
OR you could try the TaxPrinter service to convert a .tax file to pdf at
https://www.taxprinter.com