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Note: Effective January 1, 2016, the Individual Income Tax exemption amount increased from $2,150 to $2,175. Booklet IL-700-T, Illinois Withholding Tax Tables for 2016, is now available on our website. Booklet IL-700-T provides formulas and tables for employers to calculate the amount of tax to withhold from employee paychecks.

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  • Substitute Forms Developers
    If you produce, or intend to produce, your own version of the official tax forms, you can find information here about our technical specifications, enrollment, and testing requirements.