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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. An up-to-date fillable Form IL-1120-X is available for download through this link.
FAQ
Q: What is Form IL-1120-X?A: Form IL-1120-X is the Amended Corporation Income and Replacement Tax Return for Illinois.
Q: When should I file Form IL-1120-X?A: You should file Form IL-1120-X when you need to make changes or correct information on a previously filed Form IL-1120.
Q: What information do I need to complete Form IL-1120-X?A: You will need to provide the correct information for the amended sections on the form, as well as any supporting documentation.
Q: Can I e-file Form IL-1120-X?A: No, Form IL-1120-X must be filed by mail.
Q: Is there a deadline for filing Form IL-1120-X?A: Yes, Form IL-1120-X must be filed within three years from the due date of the original return or within one year from the date of any final determination, whichever is later.
Q: Can I file an amended return for a different tax year using Form IL-1120-X?A: No, Form IL-1120-X can only be used to amend returns for the same tax year.
Q: What should I do if I need to amend my federal tax return as well?A: You should file an amended federal tax return using the appropriate IRS form.
Q: Are there any additional fees for filing Form IL-1120-X?A: No, there are no additional fees for filing Form IL-1120-X.
Instruction Details:
- This 6-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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