Not sure about California, but on the east coast, in several states, to claim the state EV tax rebates 1.) you have to be a resident of that state, and 2.) the dealer has to be in that state. This is how it works for New York and Massachusetts (and I believe Maryland as well). I'm a New York State resident, so I can't claim the Massachusetts state tax rebate if I buy from a Massachusetts dealer since I'm not an MA resident, and nor can I get the NY rebate since for that to work the dealer would have to be in NY. It's too bad because other states often have EVs listed at competitive prices (MA, MD, etc), but without the state tax rebate it wouldn't make sense to purchase.