All forms related to the management of workers' compensation cases must be submitted in CompFile. All other forms should be mailed to:All Illinois Courts must accept these forms. This guide is to help workers, and their allies, navigate the Illinois workers' compensation system when they are injured or become ill on the job. We complete a document called an Application For Adjustment Of Claim. While true independent contractors are not eligible for workers' compensation benefits in Illinois, many employees are mischaracterized. This is a written request for workers' compensation benefits as a result of the incident described therein. This form enables us to calculate the correct compensation that may be due to an injured employee. Illinois requires every employer to carry workers' compensation insurance.