Employers can register electronically through the MyTax Illinois​ website. ESIS is a leading provider of managed claim services, integrated disability management and customized risk management solutions.Please use this form to apply to IDES to transer part of the experience rating record. View the ESIC Form Instructions and Details in our extensive collection of PDFs and resources. This application form can be converted to "Word" format. Provide each employee with the employee registration form (Form 6) to fill out. Gather completed forms along with the necessary documents from employees.