The agency is responsible for tax collection for state and local governments, regulating the manufacture, distribution, and sale of alcoholic beverages, and overseeing local property tax assessments. It also serves as the funding agent for the Illinois Housing Development Authority. Additionally, the agency provides access to tax forms, including federal and state tax forms, property tax relief applications, rent rebate and renter's tax credit applications, property value reassessment applications, utility tax exemption applications, and other related documents, which are available in physical locations or online for download.