PDF
Word
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: What is Form IL-1120?
A: Form IL-1120 is the Corporation Income and Replacement Tax Return for the state of Illinois.
Q: Who needs to file Form IL-1120?
A: Corporations that conduct business 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 the income and calculate the replacement tax for corporations in Illinois.
Q: Is Form IL-1120 the only tax return that corporations need to file in Illinois?
A: No, corporations may also need to file other forms such as Form IL-1120-ST or Form IL-1120-X.
Q: When is the deadline to file Form IL-1120?
A: The deadline to file Form IL-1120 is the 15th day of the 3rd month following the end of the corporation's tax year.
Q: Are there any penalties for filing Form IL-1120 late?
A: Yes, there are penalties for late filing of Form IL-1120. The penalties vary depending on the length of the delay and the amount of tax owed.
Q: What should I do if I made a mistake on Form IL-1120?
A: If you made a mistake on Form IL-1120, you should file an amended return using Form IL-1120-X.
Form Details:
- Released on December 1, 2019;
- 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
1
2
3
4
