Reading from the Tesla website:
Registering Your Tesla
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Tesla will complete registration and mail your title and registration card.
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> Tesla will mail your plates and registration once processing is complete.
And based upon what I'm reading (old threads ... so yes I did use the search function, lol) and heard from Tesla, I should be able to pick it up in Fremont CA for a drive-away w/o paying CA tax to NJ if I so choose. Just need to put down the "registration address" when you get to that step on the vehicle option purchase portion. Further down, they do ask for ID (TWIC, TSA, Passport, or even ID cards ... all issued by the US Government) should be sufficient.