Illinois Form Reg-1 Instructions - Identify your business or organization 1 federal employer identification number (fein) fein: Click here to go to mytax illinois to file your application online click here to download the pdf form. Web filing online is quick and easy! Web proprietorship — the owner (if husband/wife or civil union, enter both individuals’ information) partnership — each general. Web in summary, the registration process is pretty simple! Identify your business or organization 1 federal employer identification number (fein) fein:
Identify your business or organization 1 federal employer identification number (fein) fein: Web proprietorship — the owner (if husband/wife or civil union, enter both individuals’ information) partnership — each general. Web in summary, the registration process is pretty simple! Web filing online is quick and easy! Click here to go to mytax illinois to file your application online click here to download the pdf form. Identify your business or organization 1 federal employer identification number (fein) fein: