Activation/input license key

Hello Comunity, we bought photoshop from Amazon, the version with the one year in advance license. We downloaded it and installed it, we have that code aswell. But now, photoshop requests us, to active our copy. When we cloick the Link within the App, we can only buy and download photoshop again. Where can I enter the existing license code, without downloading the software again?

thx for help