IL-1040-X-V

This article explains what Illinois Form IL-1040-X-V is, how to file it, and how to fill it out line by line—so you can confidently pay your amended Illinois individual income taxes correctly and on time.

Form IL-1040-X-V is the Payment Voucher for Amended Individual Income Tax in the State of Illinois. It’s used when you owe additional state income tax after filing an amended Illinois Individual Income Tax Return (Form IL-1040-X). This voucher ensures your payment is correctly credited to your account. You’ll only use this form if you are mailing a payment for an amended return. If you pay electronically through MyTax Illinois, you do not need to submit this form.

The form is processed by the Illinois Department of Revenue (IDOR), which uses the voucher to link your payment to your specific taxpayer record. The form includes identifying details such as your Social Security Number(s), name, address, and payment amount.
It’s important to note that this form should only be filed if payment is due. If you owe no tax after your amended return, you don’t need to send the voucher.

The IL-1040-X-V helps IDOR handle your check or money order efficiently, reduces errors, and ensures your amended return payment is applied correctly.

How To File Form IL-1040-X-V

  1. Determine if you owe a payment after filing your amended return (Form IL-1040-X).
    • If no payment is due, do not file this voucher.
  2. Decide how you’ll pay:
    • Best option: Pay electronically via MyTax Illinois.
    • Mailing option: If you prefer to mail a check or money order, you must include Form IL-1040-X-V.
  3. Prepare your payment:
    • Make your check or money order payable to:
      Illinois Department of Revenue
    • Write your Social Security Number(s) on the check to match your voucher.
  4. Mail your payment and voucher to: Illinois Department of Revenue PO Box 19007 Springfield, IL 62794-9007
  5. Do not staple the payment to the voucher. Simply place both in the same envelope.
How To Complete Form IL-1040-X-V

How To Complete Form IL-1040-X-V

Follow these step-by-step instructions carefully to fill out every line of the form:

Line 1 – Your Social Security Number

Write your Social Security Number (SSN) clearly in the space provided.

  • This identifies you as the primary taxpayer on the amended return.
  • Ensure the number matches the one on your Form IL-1040-X.

Line 2 – Spouse’s Social Security Number

If you are filing jointly, enter your spouse’s SSN in this line.

  • If filing separately, leave this blank.
  • Do not redact or omit numbers; this can cause processing delays.

Line 3 – Your First Name and Initial

Write your first name and middle initial exactly as they appear on your tax return.

Line 4 – Spouse’s First Name and Initial

If filing jointly, enter your spouse’s first name and initial.

Line 5 – Your Last Name

Write your last name clearly in this line.

  • This must match your amended tax return to avoid misapplied payments.

Line 6 – Street Address

Enter your complete mailing address, including apartment or unit number if applicable.

  • Example: 123 Main Street Apt. 4B

Line 7 – City, State, ZIP

Write your city, state abbreviation, and ZIP code on this line.

  • Example: Chicago, IL 60601
  • Double-check for accuracy—errors can delay correspondence or cause misapplied payments.

Line 8 – Payment Amount

Enter the exact amount you owe based on your Form IL-1040-X.

  • Example: $250.00
  • Use decimal points to indicate cents.
  • This amount should match the Balance Due on your amended return.

Additional Requirements

  • Write your Social Security Number(s) on your check or money order.
  • Do not include any additional forms, letters, or explanations with your payment.
  • Keep a copy of the completed voucher and check for your records.
  • Remember: if you pay electronically, do not mail this form.
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