Your federal wages (Box 1) may not match your total NJ wages from the Box 16's of your NJ W-2's. See Enter the correct amount of income? in this NJ tax reference:
NJ Division of Taxation - Common Filing Mistakes
First, prepare your non-resident NY return.
Then combine the two Box 16 and Box 17 amounts on your NJ W-2's into a single row in order to determine the correct figures for your NJ return.
If you are concerned that your NJ W-2 amounts are incorrect, then all I can suggest is that you double-check with your employer.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
