Note: Form IL-941 is the only form used to report Illinois income tax withholding with the exception of household employee withholding, which can be reported on Form IL-1040, Individual Income Tax Return. If you have household employees, see Publication 121, Illinois Income Tax Withholding for Household Employees.
Change your withholding To change your tax withholding you should: Complete a new Form W-4, Employee's Withholding Allowance Certificate, and submit it to your employer. Complete a new Form W-4P, Withholding Certificate for Pension or Annuity Payments, and submit it to your payer.
Illinois withholding income tax payments are made on Form IL-501, Withholding Payment Coupon, and Illinois withholding is reported on Form IL-941, Illinois Withholding Income Tax Return. IMPORTANT: Make sure to use the correct version of Form IL-941 for the liability period you are filing.
Illinois withholding is reported on Form IL-941, Illinois Withholding Income Tax Return. All Form IL-941 returns are due quarterly by the last day of the month that follows the end of the quarter. You must file Form IL-941 even if no tax was withheld during the reporting period.
The IL-W-4 form is fairly straightforward. The employee must enter their name, social security number, street address, city, state, and zip code. They must also indicate the number of allowances they want to claim or are legally allowed to claim.
If you do not file a completed Form IL-W-4 with your employer, if you fail to sign the form or to include all necessary informa- tion, or if you alter the form, your employer must withhold Illinois Income Tax on the entire amount of your compensation, without allowing any exemptions.
Who must file Form ST-1? You must file Form ST-1, Sales and Use Tax and E911. Surcharge Return, if you are making retail sales of any of the. following in Illinois: • general merchandise, • qualifying foods, drugs, and medical appliances, and/or • prepaid wireless telecommunications service.