Your home state of CA can tax ALL your income, regardless of where you earn it. Your non-resident state of NY can tax your earnings from work you perform in an NY location, including remote work.
So you will file a non-resident NY tax return in addition to your resident home state CA return.
You'll be able to take a credit on your CA return for the taxes paid to NY on the portion of your income that is taxed by both states. So you won't be double-taxed.
When you do your returns in TurboTax, be sure to complete the non-resident NY return first, before you do your CA return, so that the program can apply the credit correctly.
Note: If you maintain a permanent place of abode for "substantially all" of the tax year, and you spend 184 days or more in NY during the taxable year, you'll have to file your NY return as a resident. This is more fully explained in this reference: https://www.tax.ny.gov/pit/file/pit_definitions.htm
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
