Illinois (IL) automatically grants a 6-month extension to October 15. If you owe them taxes, submit payment by April 15 to avoid penalties. You can either mail a check along with Form IL-501-I or pay online at MyTax Illinois.
Illinois (IL) automatically grants a 6-month extension to October 15. If you owe them taxes, submit payment by April 15 to avoid penalties. You can either mail a check along with Form IL-501-I or pay online at MyTax Illinois.
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