Here's the law in CA:
"Adults traveling into California from a foreign country by steamship
or airplane may carry with them a reasonable amount of alcoholic
beverages for personal or household use. That amount is not more than
60 liters (approximately 5 cases)."

We bring back this much every time. Declare all of it every time. Have
never been charged, but that would be fine. Only thing is that the
customs person usually doesn't know the law, so I carry a printout from
the ABC webpage. I have had to show it to them pretty much every time,
and they always say to me "fine, but don't try to bring this much back
again."

Check your states ABC (alcoholic beverage control) website and they
will usually have a section about importing for personal use.

Hope that helps!
e.winemonger
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www.winemonger.com