IL-1120-X-V: Payment Voucher for Amended Corporation Income and Replacement Tax (2025)
Illinois · Illinois DOR · Used for tax years 2025
Form IL-1120-X-V is an Illinois payment voucher for amended Corporation Income and Replacement Tax. It identifies the corporation, the tax year ending, and the payment amount in whole dollars.
Who files this form
Use Form IL-1120-X-V when paying Illinois amended corporation income and replacement tax by check or money order.
Do not file this voucher if no payment is due or if you pay electronically.
What you'll need
Have the following ready:
- 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 amount you are paying, in whole dollars.
- A check or money order for that amount.
- Your amended return, to which you will attach the completed voucher and payment.
How to file
- Enter your FEIN, name, C/O information if applicable, address, and phone number.
- Enter the month and year your tax year ends.
- Enter your payment amount in whole dollars only.
- Detach the voucher and enclose a check or money order payable to “Illinois Department of Revenue.” Write your FEIN, tax year ending, and “IL-1120-X-V” on the payment.
- Attach the completed voucher and payment to your amended return and mail them to:
Illinois Department of Revenue
P.O. Box 19016
Springfield, IL 62794-9016
If you pay electronically, do not file this voucher.
Common mistakes
- Filing the voucher when no payment is due or when paying electronically. The form says not to file it in either case.
- Entering cents in the payment amount. Use whole dollars only.
- Leaving your FEIN, tax year ending, or “IL-1120-X-V” off your check or money order.
- Making the payment payable to someone other than “Illinois Department of Revenue.”
Questions people ask
Do I need this voucher if I pay electronically?
No. The form says not to file it if you make your payment electronically.
Should I file the voucher if I owe nothing?
No. Do not file this form if no payment is due.
What should I write on my check or money order?
Write your FEIN, tax year ending, and “IL-1120-X-V.” Make it payable to “Illinois Department of Revenue.”
Can I enter cents in the payment amount?
No. Enter the payment amount in whole dollars only.
Do I mail the voucher separately from my amended return?
The form directs you to attach the completed voucher and payment to your amended return and mail them to the address printed on the voucher.