You need to file in both states. Your resident state of NC can tax all your income, regardless of where you earn it. CA can tax you as a non-resident on any income you earn by working in CA. You must file a non-resident CA return, plus a resident NC return.
You'll be able to claim a credit on your NC return for the taxes paid to CA, so in effect you won't be double-taxed.
In TurboTax, be sure to complete the non-resident state return first, before the home state return, so that the program can correctly calculate and apply the credit.
In the Personal Info section of TT, enter NC as your State of Residence, answer No to the question about living in another state, and answer Yes to having had income from another state.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
Yes
No
