State tax filing

IF you telecommute to a job in NY....and not form an actual office site in your home state  (not your home)...then the NY taxes apply.

Things where you wouldn't be subject to the NY telecommuter tax would be if you we e assigned to a company office in your resident state...or you were required to monitor an active  job site in your resident state (like a construction site)......  
....but working from home, doing something that could just-as-well be done by a NY resident in the NY office...then NY taxes it.
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there have been attempts in Congress to stop that type of taxation, but so far have gone nowhere.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*