How to sign up for Windows 10 Attestation signing

How do I sign up for submitting my FSFD Minifilter for Windows 10 Attestation signing? When I log in with my Microsoft Partner account and go to this page I just get the Partner Portal:
https://partner.microsoft.com/en-us/dashboard/hardware

I do have an EV Code Signing Certificate from DigiCert.

What is it that you need to know that this topic in the docs doesn’t explain?

We’re happy to help you, but would prefer not to have to retype the entire doc page, you know?

Peter