Illinois — Small Business Corporation Replacement Tax Return (Includes Schedule B)
More about the Illinois Form IL-1120-ST Tax Return
We last updated Illinois Form IL-1120-ST in February 2021 from the Illinois Department of Revenue. This form is for income earned in tax year 2020, with tax returns due in April 2021. We will update this page with a new version of the form for 2022 as soon as it is made available by the Illinois government.
Other Illinois Corporate Income Tax Forms:
In addition to information about Illinois' income tax brackets, Tax-Brackets.org provides a total of 76 Illinois income tax forms, as well as many federal income tax forms. Here's a list of some of the most commonly used Illinois tax forms:
|Form Code||Form Name|
|Form IL-1120-ST-V||Payment Voucher for Small Business Corporation Replacement Tax|
|Schedule K-1-T||Beneficiary's Share of Income and Deductions|
|Form IL-1120||Corporation Income and Replacement Tax Return|
|Form IL-1120-ST||Small Business Corporation Replacement Tax Return (Includes Schedule B)|
|Form IL-1065-V||Payment Voucher for Partnership Replacement Tax|
Disclaimer: While we do our best to keep Form IL-1120-ST up to date and complete on Tax-Brackets.org, we cannot be held liable for errors or omissions. Is this form missing or out-of-date? Please let us know so we can fix it!