The Canadian version of TurboTax CD/Download can only be installed on a maximum of 3 computers, and that has been the case for several years. You might be looking at US information.
Uninstalling from one computer doesn't reset the count for how many times the license has been used. However, if you have only installed the software on 2 computers and are still getting the message that you have no installations left, you can contact our phone support team at 1-888-829-8608 for more help.
