IL-1040-V

This article explains everything about the Illinois Form IL-1040-V (Payment Voucher for Individual Income Tax) — what it is, how to file it, and how to fill out each line correctly to ensure your Illinois state tax payment is processed without delay.

The IL-1040-V is the Payment Voucher for Individual Income Tax issued by the Illinois Department of Revenue. It is used when you choose to mail your income tax payment instead of paying electronically. This form ensures that your payment is properly credited to your Illinois Individual Income Tax Return (Form IL-1040) for the tax year 2024.

Essentially, it acts as a payment identification slip, linking your check or money order to your taxpayer information. It includes your name, Social Security number(s), and address, which allows the Department of Revenue to match your mailed payment to your filed return.

If you owe taxes for 2024 and do not wish to pay online, you must use this form to accompany your check or money order. The due date for your payment is April 15, 2025. Failing to submit it by this date can result in penalties or interest.

While mailing is still accepted, the Illinois Department of Revenue strongly encourages electronic payment through mytax.illinois.gov. Paying online avoids postal delays, saves time and postage costs, and provides immediate payment confirmation.

How To File Form IL-1040-V

  1. Prepare Your Payment
    • Write a check or money order payable to: Illinois Department of Revenue.
    • On the memo line, write your Social Security number(s) and “2024 IL-1040.”
    • Enter the exact amount you owe as shown on your IL-1040 return.
  2. Complete the Voucher Section (Bottom of the Page)
    • Fill in every field clearly (see the line-by-line guide below).
    • Use black or blue ink only.
    • Do not staple, tape, or attach the voucher to your check.
  3. Mailing Address
    Send both your completed IL-1040-V and your check or money order to:
    Illinois Department of Revenue
    Springfield, IL 62726-0001
  4. Electronic Payment Option (Recommended)
    Visit mytax.illinois.gov and use your IL-PIN or account credentials to pay electronically. This option provides instant confirmation and avoids postal delays.
How to Complete Form IL-1040-V

How to Complete Form IL-1040-V

Each section of the IL-1040-V corresponds to essential identifying and payment information. Follow these steps exactly to ensure proper processing:

1. Your Social Security Number

Enter your Social Security Number (SSN) in the first box. This number must match the SSN used on your Form IL-1040.

2. Spouse’s Social Security Number

If filing a joint return, enter your spouse’s SSN in the second box. Always list both SSNs in the same order as on your federal return.

3. Your First Name and Initial

Write your first name and middle initial exactly as it appears on your federal tax return.

4. Spouse’s First Name and Initial

If filing jointly, include your spouse’s first name and initial in the space provided.

5. Your Last Name

Write your last name clearly and legibly. This ensures your payment matches your return on record.

6. Street Address

Enter your current mailing address. This should be your permanent residence or the same address used on your IL-1040 return.

7. City, State, ZIP

Complete this section with your full city, state, and ZIP code information.

8. Payment Amount

On the “Payment Amount” line, write the total amount due in whole dollars (no cents). This must match the amount owed on your IL-1040.
Example: If you owe $725.50, write $725 on this line.

9. Check Details

  • Make your check payable to “Illinois Department of Revenue.”
  • Write your Social Security number(s) on your check.
  • Do not post-date or staple your payment to the voucher.

10. Mailing Instructions

Mail both the voucher and check/money order to:
Illinois Department of Revenue
Springfield IL 62726-0001

Make sure the envelope is postmarked no later than April 15, 2025, to avoid late payment penalties.

11. Important Security Reminder

The form clearly states:

“Do not redact Social Security Number(s) as this can cause processing delays.”
Leaving SSNs visible is necessary for matching your payment with your tax return.

Tips For Filing IL-1040-V Correctly

  • Double-check that your names and SSNs exactly match your IL-1040.
  • Use whole dollars only—no decimals or cents.
  • Always write your SSNs and “2024 IL-1040” on the check’s memo line.
  • Keep a copy of both the completed form and the check for your records.
  • If paying electronically, do not mail this voucher.
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