IL-1120-ST-V: Payment Voucher for Small Business Corporation Replacement Tax (2024)
Illinois · Illinois DOR · Used for tax years 2024
Form IL-1120-ST-V is an Illinois payment voucher for Small Business Corporation Replacement Tax payments made by mail. It identifies the business, tax year ending, and payment amount and can accompany estimated, extension, pass-through, prepayment, or return payments.
Who files this form
Use IL-1120-ST-V, the Payment Voucher for Small Business Corporation Replacement Tax, when making an IL-1120-ST payment by mail. This includes estimated, extension, pass-through, prepayment, and return payments.
Do not file this voucher if no payment is due or you pay electronically. If the department has notified you that you must pay electronically, 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.
- 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.
- Enter your payment amount using 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-ST-V” on the payment.
- Mail the completed voucher and payment to:
Illinois Department of Revenue
P.O. Box 19053
Springfield, IL 62794-9053
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 provided on the form. Do not file this voucher if you pay electronically. Electronic payment is required if the department has notified you that you must use it.
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 identifying information off your check or money order. Write your FEIN, tax year ending, and “IL-1120-ST-V” on it.
- Making the check or money order payable to the wrong recipient. Use “Illinois Department of Revenue.”
- Paying by mail after the department has notified you that electronic payment is required. In that case, you must use an electronic payment option.
Questions people ask
Which payments can I make with this voucher?
Use it for all IL-1120-ST payments that are not made electronically, including estimated, extension, pass-through, prepayment, and return payments.
Should I send the voucher if I owe nothing?
No. Do not file the voucher if no payment is due.
Do I need to mail the voucher after paying electronically?
No. The form says not to file the voucher when you pay electronically.
Can I send the voucher with my paper return?
Yes. You may attach the voucher and payment to the front page of your return and mail everything together to the address shown on your return.
Where can I make an electronic payment?
Visit tax.illinois.gov or scan the QR code provided on the form. The form encourages electronic payment to avoid mailing delays and receive immediate payment confirmation.