The Illinois Wage Deduction-AFFidavit is a form that employers must complete and submit to the Illinois Department of Labor (IDOL) when deducting wages from an employee's paycheck. This form is used to ensure that employers are deducting the correct amount of wages from each employee's paycheck in accordance with Illinois law. There are two types of Illinois Wage Deduction-AFFidavit forms. The first type is the Standard Deduction-AFFidavit, which is used for deductions that are required by law, such as Social Security, Medicare, taxes, garnishments, and other deductions that are required by law. The second type is the Voluntary Deduction-AFFidavit, which is used for deductions that are voluntary, such as health insurance premiums, union dues, or other deductions that are requested by the employee. Both types of affidavits must be completed and submitted to the IDOL before any deductions are taken from an employee's paycheck.