Can't install TurboTax on more than one computer.

Hi,

 

My family and I recently bought the TurboTax Deluxe. It states on the back "Install on up to 5 of your computers." My sister first did the download on her Mac, and it worked fine. However, upon entering the license code into my Windows computer, I saw "This license code has already been associated with an account. Please check that account and look for it in Downloads." I tried doing the same thing on my father's Mac, and received the same answer.

 

The TurboTax we bought was still sealed, so my sister was the first person to use it. This should mean that there are still 4 more installations available, correct?

 

Why can't I use the same license code? Perhaps we have done something wrong, but please let me know.

 

Thank you,