Form IL-1120-V is the Illinois Department of Revenue’s payment voucher that corporations use to mail a check or money order for Corporation Income and Replacement Tax. It is not an income tax return; it simply matches your payment to the correct corporation and tax year. The voucher prints the state’s mailing address and includes labeled boxes for your FEIN, legal name, mailing address, phone, tax-year ending month and year, and the payment amount in whole dollars only. If you pay electronically (for example, through the Department’s online system or the QR code) you do not file this voucher at all. And if the Department has told you that you’re required to pay electronically, you must use an electronic option rather than this paper voucher. When paying by mail, you write your FEIN, tax-year ending, and “IL-1120-V” on the check or money order, make it payable to Illinois Department of Revenue, detach the voucher, and mail both to the PO Box shown on the form. If you’re also mailing your corporate return, you may attach the voucher and payment to the front page of the return and mail them together as directed on the return. The voucher can be used for extension, estimate, or return payments when you are not paying electronically.
How To File It
- Decide Your Payment Method.
- Electronic payment: Strongly encouraged; you’ll avoid mailing delays, skip the post office, and receive immediate confirmation. Use the options at tax.illinois.gov or scan the QR code shown on the form. If the Department has notified you to pay electronically, you must use an e-payment option.
- Paper check or money order: Use Form IL-1120-V and mail your payment.
- Know When Not To File The Voucher.
- If no payment is due, do not file IL-1120-V.
- If you pay electronically, do not file IL-1120-V.
- Mailing Address For Voucher Payments.
Mail the detached voucher with your check or money order to:
Illinois Department of Revenue, P.O. Box 19038, Springfield, IL 62794-9038.
How To Complete IL-1120-V
Complete every field printed on the voucher. Detach the voucher before mailing with your payment.
Header — “IL-1120-V Payment Voucher for Corporation Income and Replacement Tax”
Confirms you’re using the correct voucher for corporate income and replacement tax payments. Version shown on the form is IL-1120-V (R-12/23).
“Mail To” Block
This prints the state’s remittance address you will use when mailing a check or money order: P.O. Box 19038, Springfield, IL 62794-9038.
FEIN:
Enter your Federal Employer Identification Number (nine digits). This is the primary identifier the Department uses to credit your payment.
Name:
Enter the corporation’s legal name. Use the same name that appears on your Illinois corporate return and federal return.
C/O:
If mail for the corporation should be directed “in care of” a person or firm (e.g., your CPA), enter that name here; otherwise leave blank.
Mailing Address:
Provide the corporation’s mailing address where the Department can contact you (street or PO Box).
City / State / ZIP:
Enter the city, two-letter state abbreviation, and ZIP code (ZIP+4 if known).
Phone:
Enter a telephone number (with area code) for the corporation or responsible party.
Tax Year Ending — Month / Year:
Fill in the month and year your corporate tax year ends (for example, “12 / 2024” for a calendar-year filer).
Payment Amount (Whole Dollars Only):
Enter the amount you are paying and use whole dollars only (no cents). This box is for the payment total that you are remitting with the voucher.
Check/Money Order Instructions (Printed Under The Amount Box):
On your check or money order, write your FEIN, the tax-year ending, and “IL-1120-V.” Make it payable to “Illinois Department of Revenue.” Enclose it with the detached voucher.
Electronic-Payment Reminder (Top Notice And Boxed Section):
If you pay electronically or owe nothing, do not file this voucher. The form highlights benefits of e-payment (no mail delays, no stamp, instant confirmation) and directs you to tax.illinois.gov or the QR code. If the Department has notified you that you are required to pay electronically, you must use one of the electronic options.
Five Mailing Steps (Middle Of Page):
If you’re paying by mail, follow these steps exactly:
- Enter your FEIN.
- Enter your name, any C/O information, address, and phone.
- Enter the month and year your tax year ends.
- Enter the amount you are paying (whole dollars only).
- Detach the voucher and enclose your check or money order. Write your FEIN, tax-year ending, and “IL-1120-V” on the payment, make it payable to Illinois Department of Revenue, and mail the voucher and payment to the address printed on the voucher.
If you are also filing your return by mail, you may attach the voucher and payment to the front page of your return and mail them together to the return’s address.
Purpose Note (Between Steps And Voucher):
If you are not paying electronically, this voucher can be used to make all IL-1120 payments—extension, estimate, or return.
Footer Notice:
Administrative print line: “Printed by the authority of the state of Illinois – electronic only – one copy.” (No action needed.)
Quick Compliance Checklist
- Paying electronically? Don’t file the voucher.
- No balance due? Don’t file the voucher.
- Paying by mail? Complete every field, use whole dollars, write FEIN + tax-year ending + “IL-1120-V” on the check, payable to Illinois Department of Revenue, detach the voucher, and mail to PO Box 19038, Springfield, IL 62794-9038.