Your resident state taxes ALL of your income. So California will tax you on all of your income. If you worked in NJ, you would need to file a nonresident return in NJ (as well as a resident CA return) - but NJ will only tax you on income you earned while physically present in NJ. CA will give you a credit for any tax you pay to NJ so that you are not double taxed. I am assuming you did the work in NJ.
But if you did the work for the NJ from your home in CA - you do not file the NJ return. You only need to file the nonresident return if you went to NJ and did the work there. If you were working from your CA home, that is CA income and not taxable by NJ. But if you have NJ withholding on there, you will still have to file the nonresident return to get those taxes back - you will owe them to CA.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
