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Go to this IRS website for the federal tax return mailing address, by state, with and without a tax payment - https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
Mailing your Illinois income tax return:
If no payment is enclosed, mail your return to:
ILLINOIS DEPARTMENT OF REVENUE
PO BOX 19041
SPRINGFIELD IL 62794-9041
If a payment is enclosed, mail your return to:
ILLINOIS DEPARTMENT OF REVENUE
PO BOX 19027
SPRINGFIELD IL 62794-9027
From IL-1040 Instructions
If no payment is enclosed, mail your return to:
ILLINOIS DEPARTMENT OF REVENUE
PO BOX 19041
SPRINGFIELD IL 62794-9041
If a payment is enclosed, mail your return to:
ILLINOIS DEPARTMENT OF REVENUE
PO BOX 19027
SPRINGFIELD IL 62794-902
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