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This version of the form is not currently in use and is provided for reference only. Download this version of
Instructions for Form IL-1120-X
for the current year.
Instructions for Form IL-1120-X Amended Corporation Income and Replacement Tax Return - Illinois
This document contains official instructions for Form IL-1120-X , Amended Corporation Income and Replacement Tax Return - a form released and collected by the Illinois Department of Revenue.
FAQ
Q: What is Form IL-1120-X?
A: Form IL-1120-X is the Amended Corporation Income and Replacement Tax Return specifically for the state of Illinois.
Q: When should I use Form IL-1120-X?
A: You should use Form IL-1120-X to amend a previously filed Form IL-1120, if you need to correct any errors or make changes.
Q: What information do I need to fill out Form IL-1120-X?
A: You will need information from your original Form IL-1120 as well as any necessary supporting documentation to accurately complete Form IL-1120-X.
Q: Can I e-file Form IL-1120-X?
A: No, Form IL-1120-X cannot be e-filed. It must be filed by mail or delivered in person to the Illinois Department of Revenue.
Q: Is there a deadline for filing Form IL-1120-X?
A: Yes, the deadline for filing Form IL-1120-X is generally within 3 years from the original due date of the return or within 1 year from the date you filed the original return, whichever is later.
Instruction Details:
- This 8-page document is available for download in PDF;
- Might not be applicable for the current year. Choose a more recent version;
- Complete, printable, and free.
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