Form REG1 Addendum A Fill Out, Sign Online and Download Printable
Reg 1 Form. Register faster using mytax illinois, our online account management. Web filing online is quick and easy!
Web filing online is quick and easy! Identify your business or organization check the organization type that applies to you:1. Register faster using mytax illinois, our online account management. Click here to go to mytax illinois to file your application online click here to download the pdf form.
Identify your business or organization check the organization type that applies to you:1. Identify your business or organization check the organization type that applies to you:1. Click here to go to mytax illinois to file your application online click here to download the pdf form. Register faster using mytax illinois, our online account management. Web filing online is quick and easy!