Get Illinois Revenue Board

Form 1099-G reports the amount of overpayment of state tax or any tax rebate you have received in a tax year. This overpayment could have been received as a refund or a rebate, carried forward as a credit applied to a subsequent tax year, offered as a charitable donation, or applied to other liabilities.

If you do not pay the full amount of tax due when you file your return, we will send you a bill. If you make an error, we will correct it and send you a notice showing our proposed changes and any amount due. If you owe past-due tax, we will charge you penalty and interest.

Illinois income tax is levied by the state on the income you earn within a tax year in Illinois or income earned while you are a resident of Illinois. State income taxes vary by state and are a percentage of money that you pay to the state government. Similar to federal taxes, it is self-assessed.

CHICAGO - David Harris, director of the Illinois Department of Revenue (IDOR), has been elected to serve on the Federation of Tax Administrators (FTA) Board of Trustees.

Taxpayer Assistance To receive assistance by phone, please call 1 800 732-8866 or 217 782-3336.

To inquire about a prior year's, or amended, refund status, you may call us at 800 732-8866. For more specific information about the status of your refund after IDOR has finished processing it, you can check the Illinois Comptroller's Find Your Illinois Tax Refund System.

The Illinois Department of Revenue (IDOR) sends letters and notices to request additional information and support for information you report on your tax return, or to inform you of a change made to your return, balance due or overpayment amount.

If you do not pay the full amount of tax due when you file your return, we will send you a bill. If you make an error, we will correct it and send you a notice showing our proposed changes and any amount due. If you owe past-due tax, we will charge you penalty and interest.