Form IL-1120-X-V is the Illinois Department of Revenue’s payment voucher that corporations use to mail a check or money order with an amended return for Corporation Income and Replacement Tax. It is not the amended return itself—its sole job is to match your payment to the correct FEIN and tax year on your Form IL-1120-X filing. The voucher prints the state remittance address, a clear warning that you shouldn’t file the voucher if you owe nothing or you are paying electronically, and labeled boxes for your FEIN, legal name, care-of line (if any), full mailing address, phone, tax-year ending month and year, and the payment amount in whole dollars only. When paying by mail, you write your FEIN, the tax-year ending, and “IL-1120-X-V” on the check or money order, make it payable to the Illinois Department of Revenue, detach the voucher, and attach the voucher and payment to your amended return, then mail them to the P.O. Box shown on the form. Administrative items such as “Official use only,” a scanline/barcode, and the small “Printed by the authority…” footer require no entry.
How To File IL-1120-X-V
- Choose Your Payment Method.
- Electronic payment: If you pay electronically, do not file this voucher.
- Check or money order by mail: Use IL-1120-X-V and follow the steps below.
- Prepare Your Mailing.
Detach the completed voucher, attach it and your payment to your amended return, and mail to:
Illinois Department of Revenue, P.O. Box 19016, Springfield, IL 62794-9016. - Write The Payment Properly.
Make it payable to Illinois Department of Revenue and write your FEIN, tax-year ending, and “IL-1120-X-V” on the payment. Use whole dollars only on the voucher.
How To Complete IL-1120-X-V
Complete every field that appears on the voucher; if you’re not sending a payment or you pay electronically, don’t file the voucher. Detach before mailing.
Header — “IL-1120-X-V Payment Voucher for Amended Corporation Income and Replacement Tax” (R-12/23)
Confirms you’re using the correct voucher for amended corporate payments and shows the revision date.
Mail To (Top Right):
Illinois Department of Revenue, P.O. Box 19016, Springfield, IL 62794-9016. This is the remittance address for amended-return payments.
FEIN:
Enter your Federal Employer Identification Number (nine digits). This is the key identifier used to credit your payment.
Name:
Enter the corporation’s legal name exactly as used on the amended return.
C/O:
If correspondence should be directed to a person or firm (e.g., your CPA), enter the in-care-of name; otherwise leave blank.
Mailing Address:
Provide the corporation’s mailing address (street or P.O. Box).
City / State / ZIP:
Enter city, two-letter state abbreviation, and ZIP (ZIP+4 if known).
Phone:
Enter a phone number with area code for the corporation or responsible officer.
Tax Year Ending — Month / Year:
Fill in the month and year that your amended tax year ends (e.g., “12 / 2024” for calendar year).
Notice — No Payment Or Electronic Payment:
If no payment is due or you pay electronically, do not file this voucher.
Official Use Only:
Reserved for the department—leave blank.
Payment Amount (Whole Dollars Only):
Enter the amount you are paying (integer dollars—no cents). The preprinted “$ 00” underscores whole dollars only.
Check/Money Order Instructions (Under Amount Box):
On your payment, write your FEIN, tax-year ending, and “IL-1120-X-V.” Make it payable to “Illinois Department of Revenue.”
Five Mailing Steps (Middle Of Page):
- Enter your FEIN.
- Enter your name, any C/O, address, and phone.
- Enter the month and year your tax year ends.
- Enter the payment amount (whole dollars only).
- Detach the voucher and enclose your check or money order. Write FEIN + tax-year ending + “IL-1120-X-V” on the payment, make it payable to Illinois Department of Revenue, attach voucher and payment to your amended return, and mail to the address printed on the voucher.
Scanline/Barcode And Control Code:
A machine-readable code (e.g., asterisks/letters/numbers) may appear for processing—no entry required.
Footer Notice:
“Printed by the authority of the state of Illinois – electronic only – one copy.” (Administrative note; no action needed.)