Employees residing in one of the member states may file Form WH-47, Certificate Residence, to claim an income tax exemption in Indiana. Stop paying taxes on an employee`s state of work if your employee gives you their state exemption form. Then start with the deduction for the employee`s home state. If your employee works in Illinois but lives in one of the mutual states, they can submit Form IL-W-5-NR, Employee`s Statement of Nonresidence in Illinois, for the Illinois State Income Tax Exemption. Which states have reciprocity with Iowa? Iowa actually has only one state with tax receptivity: Illinois. The combination of nexus and reciprocity helps employers decide whether or not to keep taxes on employees` paycheques. Where an employer has no connection with the State of residence of a worker, but there is a mutual agreement between the two States, the employer must respect the reciprocity agreement and cannot withhold income tax from the State in which the worker works. However, the employer is not required to withhold income tax for the state in which the worker lives, since the employer has no connection with the state of the territory (the worker would have to pay taxes estimated in this scenario). In the table below, employees who are assigned a place of work in one of the Länder in the “Labour status” column and a private address in a state on the same row in the State of residence column can choose to be taxed in their country of origin. Iowa is mutualist with only one state, Illinois.