Business Owners Toolkit. The Illinois Form IL-W4, Employee's Illinois Withholding Allowance Certificate, must be completed so that you know how much state income tax to withhold from your new employee's wages.
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.
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.
File your 2024 IL-1040 without having a MyTax Illinois account (non-login option) Under the Individuals tab, select “File a 2024 IL-1040.” Follow the instructions to complete your return.
For tax year beginning January 1, 2024, it is $2,775 per exemption. If someone else can claim you as a dependent and your Illinois base income is $2,775 or less, your exemption allowance is $2,775. If income is greater than $2,775, your exemption allowance is 0.
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 have more than one job or your spouse works, your withholding usually will be more accurate if you claim all of your allowances on the Form IL-W-4 for the highest-paying job and claim zero on all of your other IL-W-4 forms.
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.
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.