Yes, you can install TurboTax on up to five different computers. Please refer to the article below; it relates to the 2020 software, but it also works for the 2021 software. 

Can I install TurboTax on more than one computer? 

I know what the article says. In fact, that is why I asked my question. I think I need someone from Intuit, maybe their legal department to respond. The implication is that I can go to my children's homes and install it on their PCs and I am in compliance with the TT license. If that is true, fantastic! But if not...

The rule states you can install it on up to 5 computers that you own personally but I think letting a family member also install it would not be a violation of the rule.   That rule is really to keep unrelated parties from sharing the one license.