Do I need to file a nonresident tax return when the employers are listed in other states?
You only report the income in the state you reside in, unless, you were physically in the other state during the year. Many main offices are located in other states. That is where their accounting offices are. Where they prepare your W-2’s and or 1099’s. Unless you maintained an “abode”, a place to live in that state during any part of the year, you then would report that portion of income in that state. In your case, you were a resident of New Jersey for the entire year. You file a New Jersey Resident Tax Return as well as your Federal Form 1040.