Form IL-W-4 or the "Employee's Illinois Withholding Allowance Certificate" is a form issued by the Illinois Department of Revenue.
The form was last revised in August 1, 2017 and is available for digital filing. Download an up-to-date Form IL-W-4 in PDF-format down below or look it up on the Illinois Department of Revenue Forms website.
Oops! This feature is under construction and will be available soon.