Legal Question in Business Law in California

No, with very few exceptions, a valid corporation incorporated and in good standing in another state or country can do business in California by registering as a foreign corporation. However, for tax, accounting, banking, and sometimes immigration and visa reasons, most overseas corporations find it to be far preferable to set up a wholly owned US subsidiary. It is very easy and fairly inexpensive to do, and having a US subsidiary usually saves much more time, money, and work than it costs to set up.