Tax Law: Federal & State Agencies
INTERNAL REVENUE SERVICE
www.irs.gov
SECURITIES & EXCHANGE COMMISSION
www.sec.gov
ILLINOIS DEPARTMENT OF REVENUE
www.revenue.state.il.us
ILLINOIS PROPERTY TAX APPEAL BOARD
www.state.il.us/agency/ptab/
ILLINOIS AUDITOR GENERAL
www.auditor.illinois.gov/Career-Information/audit-career.asp