I would also add that if you never worked in CA but the company reported CA wages on the W-2, I would ask it to cite what Ca law would make such wages taxable there.
if Ca wages were on the W-2 and the company won't correct, (this assumes that they can not cite any law which would make some of your wages taxable there) your only recourse is to file a CA return as stated above (sooner or later you will get a notice for non-filing) and then see a lawyer. but ask yourself, do you value your job and how would you feel if suddenly you had to find a new one?
