And...which two states are involved?
Some states have reciprocal tax agreements between them, where one state won't tax the residents of the other state. In that situation, the employer "might" be able to withhold for the proper resident state, but may not be registered to do so, nor are they required to do so. It's still income that will be taxed by your resident state.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
