If your domicile (your main, permanent home) is in California, for tax purposes you remain a resident of California during temporary absences. Your income remains fully taxable by California, regardless of where you earn it.
Income from work physically performed in Hawaii in taxable by Hawaii.
Therefore you must file two state tax returns: a non-resident Hawaii tax return reporting your income earned in Hawaii, and your home state California tax return, reporting all your income - including what you earned in Hawaii.
You'll be able to claim a credit on your CA return for the taxes paid to HI, so you won't be double-taxed.
TurboTax can handle this common situation.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
