If you are claiming a physical disability, you must have the certificate on the back side of the application signed by a physician licensed to practice medicine in the State of Ohio. If you are claiming a mental disability, you must have the certificate signed by a physician or psychologist licensed to practice in Ohio. In order to qualify for the homestead exemption, an owner's disability must be permanent and total and prevent the person from working at any substantial employment. You may also submit a current certificate from any state or federal government agency that classifies you as disabled, as defined above.
The certificate is part of the application form, DTE 105A.