Illinois Form 941 - Instructions available at tax.illinois.gov step 2: 2024 tax year (for withholding taxes 01/01/2024 through 12/31/2024) 2023 tax year (for withholding. Illinois withholding income tax return. This form is required to be filed electronically. Illinois withholding income tax return. Filing online is quick and easy!
Filing online is quick and easy! 2024 tax year (for withholding taxes 01/01/2024 through 12/31/2024) 2023 tax year (for withholding. Illinois withholding income tax return. Instructions available at tax.illinois.gov step 2: This form is required to be filed electronically. Illinois withholding income tax return.