You can apply to the Certified Photographer Program, even if you already have an account, as long your registered as a photographer.
Log in to the web portal
Go to Settings > General
Make sure your Customer type is (or change it to) "Photographer"
Go to the Billing tab and make sure your current plan is “Pay-as-you-go President” and you have added your credit card details.
Go back to the General tab
Under Certified Photographer Profile click the link “Apply to certified photographer program”.
If your plan is set as “In-App President”, you cannot see the link, or have any questions, please contact our support team by chat or send an email to email@example.com we will be happy to assist you.