You can apply for an FA Disclosure and Barring Service (DBS) in one of the following ways:
1. If you are attached to a club, contact your club welfare officer who will be able to give you access to their online portal. They will have the ability to verify the documents you need to submit in support of your application
2. Contact your local County FA welfare officer who will be able to assist you
Further guidance on how to get a check done can be found here.