Sorry in advance for how crazy neurotic this must seem. Application season brings out the worst in me. I'm originally from and attending medical school on the east coast. The year I was applying to medical school I moved to California and was working out there. Following admission, I took a leave of absence and continued to work in California for an additional two years (3 years in total) - paid taxes and everything for all 3 years. However, for the purposes of my medical school I was considered an in state student. The thing is I'd really like to go back to california and I hear it helps to be a California resident - where would I fall?