Illinois Form Il 941 - This form is required to be. If the due date falls on a weekend or holiday, the payment is due on the next. This form is required to be filed electronically. Filing online is quick and easy! 2023 illinois withholding income tax return.
This form is required to be filed electronically. 2023 illinois withholding income tax return. If the due date falls on a weekend or holiday, the payment is due on the next. This form is required to be. Filing online is quick and easy!