Tax Center
TAX INFORMATION
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Track Your Refund — IRS
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Track Your Refund — ILLINOIS
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Tax Calendar For Business And Self Employed
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Tax Calendars For Use In 2019 (PDF)
TAX FORMS
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Publication 15 (Circular E), Employer’s Tax Guide (PDF)
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Publication 17, Your Federal Income Tax (PDF)
PAYROLL TAX FORMS
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Form W-9, Request for Taxpayer Identification Number (TIN) and Certification (PDF)
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FEDERAL Form W-4, Employee’s Withholding Allowance Certificate (PDF)
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ILLINOIS Form W-4, Employee’s Withholding Allowance Certificate (PDF)