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- IL State Tax Envelope for Refund - 6" x 9" (ILR610)
IL State Tax Envelope for Refund - 6" x 9" (ILR610)
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State tax filing envelope for returns with a refund in Illinois.
Mailing Address:
- ILLINOIS DEPARTMENT OF REVENUE
- PO Box 19041
- SPRINFIELD, IL 62794-9041