Form IL-W-4 - Employee's / Payee's Illinois Withholding Allowance Certificate and Instructions

Please download the following attachment for the Form IL-W-4 (Employee's and other Payee's Illinois Withholding Allowance Certificate and Instructions. These instructions are written for employees to address withholding from wages. However, this form can also be completed and submitted to a payor if an agreement was made to voluntarily withhold Illinois Income tax from other (non-wage) Illinois income.