When you launch the program, it should try to update. If it doesn't, you can select Help>Check for updates from the top menu. If that doesn't work you can reinstall the program using the Download, which has the latest updates included in the file.
You can download the current version of TurboTax CD/download edition here: Choose the 2023 TurboTax edition you need (for Windows). You can download older versions of TurboTax CD/download edition here: Where can I download the CD/download edition of TurboTax?