You can review the extensive information available for free at the Social Security Administration's website at www.ssa.gov . The site has information on the qualifications needed for various benefits administered by SSA.
In general, one would file an application with the SSA. The SSA collects the relevant information and determines if the applicant is qualified. If the applicant disagrees with the SSA's decision, the applicant has a time period to appeal the decision. The decision letter from the SSA will explain the appeal procedures.
If you are in Kent, there is an SSA office on James. You can get the full address from the SSA's website.