Nonresidents and PartYear Residents File a California tax return if you have any income from California sources and your gross income (which. Notice of Motion and Declaration for Joinder.Does she claim to be a resident of California? â–¡Yes â–¡ No. Is she a U. S. citizen? Complete an Affidavit of Domicile and File it with the Court. A good tax attorney can help convince California that you don't actually live here and therefore should not pay state taxes. Under California law, San Diego State University must determine the residency status for tuition purposes of all applicants and students. If a person is considered a resident of California, they generally have to pay California state income tax on all of their income. This page is for students requiring assistance with their residency status. Please select the statement that best describes you.