IL-1120-V: Payment Voucher for Corporation Income and Replacement Tax (2025)
Illinois · Illinois DOR · Used for tax years 2025
Form IL-1120-V is a payment voucher for Illinois Corporation Income and Replacement Tax payments made by mail, including estimated, extension, and return payments. It identifies the taxpayer, tax year ending, and payment amount in whole dollars.
Who files this form
Use IL-1120-V for all IL-1120 payments made by mail, including estimated, extension, and return payments for Corporation Income and Replacement Tax.
Do not file this voucher if no payment is due or you pay electronically. If the Illinois Department of Revenue has notified you that electronic payment is required, you must use one of its electronic payment options.
What you'll need
To complete the voucher and pay by mail, have:
- Your federal employer identification number (FEIN).
- Your name, C/O information if applicable, mailing address, and phone number.
- The month and year your tax year ends.
- The payment amount, in whole dollars only.
- A check or money order for the amount you are paying.
How to file
Pay by mail
- Enter your FEIN, name, C/O information if applicable, address, and phone number.
- Enter the month and year your tax year ends and your payment amount in whole dollars.
- Detach the voucher and enclose your check or money order.
- Make the payment payable to “Illinois Department of Revenue.” Write your FEIN, tax year ending, and “IL-1120-V” on the check or money order.
- Mail the voucher and payment to:
Illinois Department of Revenue
P.O. Box 19038
Springfield, IL 62794-9038
If you are also filing your return by mail, you may attach the voucher and payment to the front page of your return. Mail them together to the address shown on your return.
Pay electronically
Visit tax.illinois.gov or scan the QR code on the form. Do not file this voucher when paying electronically. You must pay electronically if the department has notified you that you are required to do so.
Common mistakes
- Filing the voucher when no payment is due or when paying electronically. The form says not to file it in either case.
- Paying by mail after the department has notified you that electronic payment is required.
- Leaving cents in the payment amount. The voucher requires whole dollars only.
- Forgetting to write your FEIN, tax year ending, and “IL-1120-V” on your check or money order.
- Using the wrong payee. Make your check or money order payable to “Illinois Department of Revenue.”
Questions people ask
Can I use this voucher for estimated or extension payments?
Yes. Use it for all IL-1120 payments that are not made electronically, including estimated, extension, and return payments.
Do I send the voucher if I pay electronically?
No. Do not file the voucher if you pay electronically or if no payment is due.
Can I mail the voucher with my return?
Yes. If you file your return by mail, you may attach the voucher and payment to the front page of the return and mail everything to the address shown on your return.
Where can I make an electronic payment?
Visit tax.illinois.gov or scan the QR code on the form. The form says electronic payment avoids mailing delays and provides immediate confirmation of your payment.
What should I write on my check or money order?
Write your FEIN, tax year ending, and “IL-1120-V.” Make it payable to “Illinois Department of Revenue.”