Ohio uses the national AMFTRB Examination. Information can be found at amftrb.org
AMFTRB has recently begun working with a new testing vendor, Professional Testing Corporation (PTC). As a result, the format for the examination has changed considerably. Beginning in 2015, the exam will be offered the third week of every month. A Handbook for Candidates is available at www.ptcny.com/clients/amftrb and at www.amftrb.org.
Once approved to sit for the exam by this Board (see application instructions), an applicant will be issued an eligibility letter with instructions on how to register for the examination with PTC. The test is offered for approximately one week out of every month, and you can find a calendar on AMFTRB's website here.
Links to study guides to prepare for examination: