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Illinois automatically grants a filing (not payment) extension to October 15, 2023. If you owe, submit payment by April 18, 2023, to avoid penalties and interest, either by including a check with your mailed Form IL-501-I or by paying online at MyTax Illinois.
Illinois automatically grants a filing (not payment) extension to October 15, 2023. If you owe, submit payment by April 18, 2023, to avoid penalties and interest, either by including a check with your mailed Form IL-501-I or by paying online at MyTax Illinois.
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