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Electronic filing for Withholding Income Tax (Form IL-941)

MyTax Illinois is a free online application for electronically filing your Form IL-941 Illinois Withholding Tax Return. Follow the instructions on the MyTax Illinois screens and enter your tax information. MyTax Illinois will calculate your return and tell you whether or not you have a balance due or are overpaid. At the end of your successful filing, you will be given a confirmation number, which is your proof of filing.

To make your semi-weekly or monthly payments of withholding tax online, use MyTax Illinois.