Once distributions begin, the distributed monies are fully taxable as ordinary income for federal tax purposes. Taxing the income Illinois residents receive from nonqualified deferred compensation plans.Income from the SURS Deferred Compensation Plan is not subject to State of Illinois tax when taken as a qualified distribution. A 457(b) plan is a tax-deferred retirement savings plan. Funds are withdrawn from an employee's income without being taxed and are only taxed upon withdrawal. First, if she lives in a state that doesn't tax 457 withdrawals, such as Illinois, she will avoid the state tax completely. The State of Illinois Employees' Deferred Compensation Plan is a supplemental tax-deferred retirement plan for state employees. Amends the Deferred Compensation Article of the Illinois Pension Code.