2024 IL-941 Illinois Withholding Income Tax Return

Important: This form is required to be filed electronically. Electronic mandate

Filing online is quick and easy!

• Click here to file your IL-941 online
  If you are unable to file electronically, you may request Form IL-900-EW, Waiver Request, through our Taxpayer Assistance Division at 1 800 732-8866 or 1 217 782-3336. The Waiver Request must be completed and submitted back to the Department. You will be notified if the Waiver Request is approved or denied.
• Right click here and "save as" to download the 2024 PDF form. Then open the saved PDF file using Adobe Acrobat.