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Illinois Department of Revenue Customer FAQ

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What is Illinois Department of Revenue's Phone Number?

The question we are asked most often is about how to talk to Illinois Department of Revenue customer service. Click here for contact information, email and chat options, getting a live person, wait times and more.
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Recent Illinois Department of Revenue Customer Questions

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Filing Procedures

What is the deadline for filing state taxes in Illinois?

In Illinois, state income tax returns are generally due by April 15, coinciding with the federal deadline. If that date falls...
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Can I e-file my state taxes in Illinois?

Yes, individuals in Illinois can e-file their state taxes through the Illinois Department of Revenue's online system, which is...
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How can I update my information with the Illinois Department of Revenue?

To update personal or business information with the Illinois Department of Revenue, first identify what needs changing....
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Tax Rates and Refunds

What are the income tax rates in Illinois?

Illinois has a flat income tax rate of 4.95 percent for individual taxpayers, while corporations are taxed at 9.5 percent, plus...
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When will I receive my state tax refund?

The timing of state tax refunds from the Illinois Department of Revenue varies, typically taking a few weeks after filing,...
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What is the sales tax rate in Illinois?

In Illinois, the state sales tax rate is 6.25 percent, but local taxes can raise this amount significantly, sometimes exceeding...
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Are Social Security benefits taxable in Illinois?

Social Security benefits are not subject to state tax in Illinois, meaning recipients do not include them in their state...
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Tax Credits and Incentives

Are there any tax credits or deductions available in Illinois?

Illinois provides various tax credits and deductions for individuals and businesses, such as the Earned Income Tax Credit and...
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Are there tax incentives for businesses in Illinois?

Illinois provides various tax incentives for businesses to support growth and investment, including programs like EDGE for job...
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Tax Compliance

What is the property tax assessment process in Illinois?

In Illinois, the property tax assessment process begins at the county level with local assessors estimating fair market values....
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What are the consequences of underreporting my income taxes in Illinois?

Underreporting income taxes in Illinois can lead to penalties, interest, and legal action. The Illinois Department of Revenue...
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What should I do if I receive a notice of audit from the Illinois Department of Revenue?

If a notice of audit is received from the Illinois Department of Revenue, it is vital to carefully read the notice to...
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