After you have the test labels you’ll call FedEx. The prompts can be a bit tricky. The Technical Support hotline is: 877-339-2774. When prompted, say “API” and this should route you to the correct department which is the FedEx Web Integrated Solutions Consultation Team.
You’ll tell the FedEx team member that you are ready to enable your Production credentials for the Advanced FedEx Web Services with Shipping Labels.