The State of Illinois Deferred Compensation Plan is a supplemental retirement program for State employees. Deferred compensation plans are designed for state and municipal workers, as well as employees of some tax-exempt organizations.Please schedule a Local Office: In-Person Appointment or call us at 1-855-457-2489. Download any State of Illinois Deferred Compensation Plan form now using Acrobat Reader. These forms allow data to be typed into the form and saved. NACo's Deferred Compensation Program has helped more than 1.5 million county employees and retirees save for and live comfortably in retirement. Additionally, the Ohio Department of Taxation provides a fillin worksheet to assist in the calculation of the credit. Employer Website; Accessibility.