Form Il-1065 Instructions - To make a return or extension payment, use this. Web this form is for tax years ending on or after december 31, 2023, and before december 31, 2024. 7, 2022, 9:00 pm pst. For all other situations, see.
7, 2022, 9:00 pm pst. Web this form is for tax years ending on or after december 31, 2023, and before december 31, 2024. For all other situations, see. To make a return or extension payment, use this.