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.
Income Tax returns and schedules. The Illinois Business Income Tax rate for tax years. ending on or after December 31, 2015, is 5.25 percent. (.0525) for taxpayers taxed as corporations, and 3.75. percent (.0375) for taxpayers taxed as trusts or estates. The instructions for overpayments to be carried forward.
State Income Tax Rates. Illinois State Income Tax Rates - 2017 State Taxes Guide. While the federal tax rates are the same for all fifty states, the various states are left to determine what their state income tax rate should be and those numbers are all over the map. Latest Illinois State Income Tax Rates Forum Posts.