Hi, I'm originally from CA but I'm attending undergrad on the east coast. I recently took a closer look at my pay stub from workstudy and I'm paying taxes for the other state, not CA. I've filed CA tax returns for the past three years since I haven't made enough more to get money back. Should I file a CA tax return or the other state's tax return next year? Would filing the other state's tax return so I could get some money back null my CA residency status (Important for med school since CA has a lot of med schools)? (My federal tax return is sent to my CA address). How do med schools define residency?