2025 Form Il-1040 , 2025 Form Il-1040. Mail in the tax amendment form. We will update this page for tax year 2025 as the forms, schedules, and instructions become available. We will update this page for tax year 2025 as the forms, schedules, and instructions become available. Made a mistake on your illinois tax return? 2025 Form Il-1040 Images References : 2025
2025 Form Il-1040. Mail in the tax amendment form. We will update this page for tax year 2025 as the forms, schedules, and instructions become available. We will update this page for tax year 2025 as the forms, schedules, and instructions become available. Made a mistake on your illinois tax return?