This is somewhat unique to CA but it was in the news recently. https://www.sambrotman.com/personal-income-tax-residency-california/income-sources-california-st

This is somewhat unique to CA but it was in the news recently. https://www.sambrotman.com/personal-income-tax-residency-california/income-sources-california-state-tax https://www.sambrotman.com/personal-income-tax-residency-cal... https://www.ftb.ca.gov/forms/misc/1004.html https://www.ftb.ca.gov/forms/misc/1004.html