Employers can register electronically through the MyTax Illinois​ website. You can register electronically using MyTax Illinois, available at mytax.illinois.gov.Proof of identification may be required to complete the actual application. New Hire Paperwork for Illinois includes filing of federal and state forms. They are W-4, IL-W-4, I-9 and WOTC. This step-by-step guide to the Illinois business registration process will show you what to do to conduct business in Illinois or hire workers from there. Please use this form only if you are a sole proprietor registering for a Chicago business tax and you are not required to obtain a Chicago business license. OTHER. In case of emergency, notify: Name: Address: Phone: The facts set fourth in my application for employement are true and complete. View available online filings and services below. Bank of America employees can register and receive a guaranteed entry to the 2025 Chicago Marathon.