I can likely assist you. If not, I have several people to whom I can refer you too.
Marty Davidoff, email@example.com, 732-274-1600. This answer is provided for general information only. You should seek advice from an attorney or tax professional.
The short answer is "yes," there are a number of well-qualified attorneys on this site who can answer your questions about US (federal and state) taxation of nonresidents. I have experience in this area of law and would be more than happy to consult with you on your matters; I can be reached by email at firstname.lastname@example.org.