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This version of the form is not currently in use and is provided for reference only. Download this version of
Form IL-1120
for the current year.
Form IL-1120 Corporation Income and Replacement Tax Return - Illinois
What Is Form IL-1120?
This is a legal form that was released by the Illinois Department of Revenue - a government authority operating within Illinois. Check the official instructions before completing and submitting the form.
FAQ
Q: Who needs to file Form IL-1120?
A: Corporations that have income taxable in Illinois need to file Form IL-1120.
Q: What is the purpose of Form IL-1120?
A: Form IL-1120 is used to report corporate income and calculate the replacement tax owed to the state of Illinois.
Q: When is Form IL-1120 due?
A: Form IL-1120 is due on the 15th day of the 3rd month following the close of the tax year.
Q: Are estimated tax payments required for corporations filing Form IL-1120?
A: Yes, corporations are required to make estimated tax payments throughout the year.
Form Details:
- Released on December 1, 2022;
- The latest edition provided by the Illinois Department of Revenue;
- Easy to use and ready to print;
- Quick to customize;
- Compatible with most PDF-viewing applications;
- Fill out the form in our online filing application.
Download a fillable version of Form IL-1120 by clicking the link below or browse more documents and templates provided by the Illinois Department of Revenue.
Download Form IL-1120 Corporation Income and Replacement Tax Return - Illinois
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