Il-1040-X Form - Automatic extension payment for individuals filing. Web instructions if you need to change, amend an efiled illinois state income tax return for the current tax year. Payment voucher for amended individual income tax. Web foreign tax credit or deduction.
Web instructions if you need to change, amend an efiled illinois state income tax return for the current tax year. Web foreign tax credit or deduction. Automatic extension payment for individuals filing. Payment voucher for amended individual income tax.