H.R.3359: To limit the authority of States and localities to tax certain income of employees for employment duties performed in other States and localities.

Mobile Workforce State Income Tax Fairness and Simplification Act of 2007- Limits state or local taxation of the compensation of any employee who performs duties in more than one state or locality to: (1) the state or locality of the employee's residence; and (2) the state or locality in which the employee is physically present performing duties for more than 60 days.