Form Reg 1 Illinois - Register faster using mytax illinois, our online account management. Web proprietorship — the owner (if husband/wife or civil union, enter both individuals’ information) partnership — each general. Web illinois department of revenue. Identify your business or organization. 1 federal employer identification number (fein) fein:
1 federal employer identification number (fein) fein: Register faster using mytax illinois, our online account management. Web illinois department of revenue. Web proprietorship — the owner (if husband/wife or civil union, enter both individuals’ information) partnership — each general. Identify your business or organization.