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The due date for the Tax Year 2009 First Installment was Tuesday, March 2, 2010.
NOTE: A law passed by the Illinois Legislature in 2009 raises the First Installment tax from 50% to 55% of the prior year's total tax.
The due date for the Tax Year 2008 Second Installment was Tuesday, December 1, 2009.
You may pay by mail or online by selecting the Payments tab on this site.
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