I have used 3 out of 5 licenses. One existing license is on a Pixel 6 which we don’t have any longer. I want to add a pixel 8 cell phone, but to add a device, the system wants me to buy a whole new subscription.
What you are probably seeing is that during the installation process, you are choosing the option to Start a Subscription. You need to look for a Sign in or I already have a subscription option. That will take you to a login to your Norton Account where you can choose an active subscription in your account to use for activating the new device.