Yes. California requires non-residents to file & pay income tax for any days worked in the state, regardless of where you live or typically work: https://law.

Yes. California requires non-residents to file & pay income tax for any days worked in the state, regardless of where you live or typically work: https://law.justia.com/cases/california/court-of-appeal/3d/208/972.html https://law.justia.com/cases/california/court-of-appeal/3d/2... Sometimes the tax is fine-grained enough to be certain blocks, not just within state or city limits. For example, Portland, Oregon has an income tax (with mandatory employer withholding) for employees working in the downtown district, to fund public transit: https://www.portland.gov/revenue/withholding https://www.portland.gov/revenue/withholding