Yes you are allowed to install it on 5 computers. But this year and maybe even last year there is a problem installing the CD. Ever since they started using this License Code 2 years ago. Last year I installed the CD. Then I tried to install it on my laptop and couldn't. I had to call in and get the download put in my online account. This year I was ready for that. Even though I bought the CD at Costco I used the Download method to install it. Then I could download it again to my laptop. That's why I was curious how you got the CD installed on the second computer. See the second sentence on this FAQ
https://ttlc.intuit.com/community/installing/help/i-bought-the-cd-but-my-computer-doesn-t-have-a-cd-...
