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.
For all counties in Illinois, except Cook County, the state distributes 0.25% of the 6.25% to counties. In Cook County the 0.25% tax is collected by the state and allocated to the Regional Transportation Authority (RTA). Composite Sales and Use Tax in the Chicago Region.