How did you get these downloaded files? If from Intuit, you need to Sign In to your Account to activate TurboTax. Here's more info on Starting TurboTax.
If from a vendor, they should send you a link for installation (check your emails).
If one of the files in your Downloads is an .exe file, try clicking on that to install TurboTax and have the icon on your desktop.
If you can't resolve this, here's how to Contact TurboTax Support.
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