Article I of the United States Constitution created and empowered our legislative branch of government. The United States Congress leads the legislative branch. Congress includes both the House of Representatives and the Senate. Generally speaking, Congress makes our laws.
Illinois income tax is levied at a flat 3% rate regardless of income level. A deduction of $2,000 is allowed for each exemption claimed on your federal return. You can also receive an additional $1,000 exemption if you or your spouse is 65 or older, legally blind, or both.
Illinois' income tax is imposed on every individual, corporation, trust and estate earning or receiving income in the state. The tax is a flat percentage of a taxpayer's federal adjusted gross income. More on Illinois taxes can be found in the tabbed pages below. 1  Income.