Illinois Reg-1 Form - 1 federal employer identification number (fein). Identify your business or organization. Mail the completed form to the address provided on the form. Click here to go to mytax illinois to file your application online. The form includes information about your business name, address, owners, officers, activities, and taxes. Select the “registration” tab on the top right corner of the page. Web to register your business you must. Click the “register a new business” hyperlink and complete the online registration. Electronically register through mytax illinois (approximately one to two days to process); May 2023 for businesses without a mytax illinois logon:
May 2023 for businesses without a mytax illinois logon: Did you know you may be able to file this form online? Mail the completed form to the address provided on the form. Web to register your business you must. Click here to go to mytax illinois to file your application online. The form includes information about your business name, address, owners, officers, activities, and taxes. Complete the form, ensuring all required information is provided. 1 federal employer identification number (fein). Select the “registration” tab on the top right corner of the page. Electronically register through mytax illinois (approximately one to two days to process); Filing online is quick and easy! Click here to download the pdf form. Identify your business or organization. Click the “register a new business” hyperlink and complete the online registration.