TurboTax software can be installed, authenticated, and activated on up to 5 different computers you OWN per the TurboTax Desktop Software End User License Agreement for Tax Year 2021 You cannot share the software with others.

You can download your software to the other computer, click to install, then enter your License number.

How do I move my tax data file to another computer?

https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-move-my-tax-data-file-to-another-compu...