If you receive a federal extension of more than six months, you are automatically allowed that extension for Illinois. If you owe tax you must file Form IL-505-I.
Forms to Use:
Form IL-505-I
Check other state tax links below.
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If you receive a federal extension of more than six months, you are automatically allowed that extension for Illinois. If you owe tax you must file Form IL-505-I.
Forms to Use:
Form IL-505-I
Check other state tax links below.