Participants with questions should contact the Service Center at 877.644. Forms and Help. Forms. Help.If you have questions, contact Ohio Deferred Compensation. Get the help you need​​ Call 877-644-6457 to talk to our Service Center if you need help updating your personal information. For further information, the employee should contact our Service Center at 877-644-6457 and press 3 to speak with an Account Executive. Call 1-888-867-5175 Email us.