Sales Rep taxed in different states
We are a California based company with sales reps in many states that work from their home office but travel to a couple of states as their territory. In the past we have withheld taxes based on the state they live in. Recently we hired an employee that lives/works from his home in Texas but will be in the California office one week a month. How should we be taxing their wages? Can anyone point me to a resource please? Thank you in advance for your input.