Before registering in the Apple Developer Program we need to look up the DUNS number for your studio. Or if your studio is a DBA we'll need the DUNS number for the parent company. Please enter your info into Apple's search tool here to find your DUNS number: https://developer.apple.com/enroll/duns-lookup/#!/search
If it turns out you don't have a DUNS number, the form will automatically submit your info to register one.
Registering the DUNS number is free but it can take up to 4 weeks to process, so be sure to submit your info as soon as possible.