An employer must withhold Arizona income tax from employees whose compensation is for services performed within Arizona. Will my pay be taxed?Yes, my pay will be subject to tax. 5. Any amount of tax actually deducted and withheld under this Act shall be held to be a special fund in trust for the Department. You must file Form IL-W-4 when Illinois. Income Tax is required to be withheld from compensation that you receive as an em- ployee. The constitutional right to interstate travel is considered a fundamental right. The I-CAN modules can help. In the U.S., property taxes predate even income taxes. The Attorneys On Retainer Program provides the ultimate self-defense plan for responsible gun owners, and the necessary legal defense and financial support.