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Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems.  We are aware of this issue and are diligently working on restoration.

What publication provides general information about Illinois Withholding Income Tax?

Please refer to the following publications:

  • Publication 130, Who is Required to Withhold Illinois Income Tax
  • Publication 131, Withholding Income Tax Payment and Filing Requirements
  • Publication 121, Illinois Income Tax Withholding for Household Employees
  • Publication 110, Forms W-2, W-2c, W-2G, and 1099 Filing Requirements for Employers and Payers, including 1099-K Electronic Requirements
  • Booklet IL-700-T, Illinois Withholding Income Tax Tables
  • Publications 131-D, Withholding Income Tax Payment and Return Due Dates.

If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.