@aa2014 --
As per the NJ tax reference I cited earlier, if you had NJ-source income after you moved out of NJ, NJ wants you to file both a part-year resident and a part-year non-resident tax return. The rule doesn't really make sense in your example, since if you file as a full-year NJ resident all your income gets taxed by NJ. Why would they complain about that? But nevertheless, the rule is there.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
