Edit, Download, and Sign the Illinois IL-425 Identity Verification Document
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How do I fill this out?
To fill out the IL-425 form, start by providing your personal information such as your name and address. Next, indicate your tax return information, including your Social Security number and refund amount. Finally, attach the necessary documents for identity verification as requested.

How to fill out the Illinois IL-425 Identity Verification Document?
1
Identify yourself by providing your personal information.
2
Provide the required details about your tax return.
3
Enter the refund amount, if applicable.
4
Attach the required identity verification documents.
5
Submit the completed form to the Illinois Department of Revenue.
Who needs the Illinois IL-425 Identity Verification Document?
1
Taxpayers who did not receive their identity verification letter.
2
Individuals reporting identity theft related to their tax return.
3
Those needing to verify their identity for tax refund processing.
4
Anyone filing an Illinois Individual Income Tax Return (IL-1040).
5
Parents or guardians of minors who need to submit for identity verification.
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What are the instructions for submitting this form?
Submit the completed IL-425 form along with the required documents to the Illinois Department of Revenue Anti-Fraud Unit. Mailing address: PO BOX 19049, Springfield, IL 62794-9049. For electronic inquiries, call 800-732-8866 or 217-782-3336 during business hours.
What are the important dates for this form in 2024 and 2025?
Important dates for submitting the IL-425 may vary annually. Ensure to check the Illinois Department of Revenue for specific deadlines related to the tax year you are addressing. Regular updates can help you comply with any new requirements.

What is the purpose of this form?
The IL-425 form is designed to assist taxpayers in verifying their identity with the Illinois Department of Revenue. It is particularly important for those who have not received their verification letter or are reporting identity theft. This form ensures that your tax return will be processed without unnecessary delays.

Tell me about this form and its components and fields line-by-line.

- 1. Your Name: Full name of the taxpayer.
- 2. Spouse's Name: Full name of the taxpayer’s spouse, if applicable.
- 3. Mailing Address: Address where the taxpayer receives mail.
- 4. City: City of the mailing address.
- 5. State: State of the mailing address.
- 6. ZIP: ZIP code of the mailing address.
- 7. Social Security Number: Taxpayer's Social Security number.
- 8. Daytime Phone Number: Contact phone number.
- 9. Email Address: Email for communication purposes.
- 10. Tax Year: Year of tax return in question.
- 11. Refund Amount: Refund amount reported on the IL-1040.
What happens if I fail to submit this form?
Failure to submit the IL-425 form may delay the processing of your tax return and could result in penalties.
- Delayed Processing: Your tax return will not be processed until your identity is verified.
- Penalty Risks: Not submitting the required verification can lead to potential penalties.
- Identity Theft Concerns: Submitting the form late or not at all may risk exposure to identity theft.
How do I know when to use this form?

- 1. Not Received Verification Letter: File when the verification letter sent by the Department of Revenue is missing.
- 2. Identity Theft Reporting: Use if your tax return was filed fraudulently.
- 3. Filing for Refunds: Important to file if you expect a state tax refund.
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What information do I need to fill out?
You will need to provide personal details, tax return information, and attach identity verification documents.
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