Fun facts: California's GDP is larger than all but 4 countries (the United States, China, Japan and Germany).
In terms of Purchasing Power Parity, it is larger than all but 8 countries (the United States, China, India, Japan, Germany, Russia, Brazil and Indonesia).[

http://www.cdtfa.ca.gov/industry/wayfair.htm
Use Tax Collection Requirements Based on Sales into California Due to the Wayfair Decision
Beginning today, retailers located outside of California are required to register with the California Department of Tax and Fee Administration (CDTFA), collect the California use tax, and pay the tax to the CDTFA based on the amount of their sales into California, even if they do not have a physical presence in the state. The new collection requirement applies to a retailer if during the preceding or current calendar year:
* The retailer's sales into California exceed $100,000, or
* The retailer made sales into California in two hundred (200) or more separate transactions.
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The new collection requirement will apply to taxable sales of tangible personal property to California consumers on and after today, and is not retroactive. Retailers reaching either of the above sales thresholds are now required to register with the CDTFA to collect the California use tax even if they were not previously required to register.
These retailers include retailers that sell tangible goods for delivery into California through the Internet, mail-order catalogs, telephone, or any other means.
This guide contains information about the effect of the Wayfair decision on the California state, local and district use tax, and special taxes and fees collection requirements.
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Get it in Writing
Our tax and fee laws can be complex and difficult to understand.
If you have specific questions about this exemption and who or what qualifies, we recommend that you get answers in writing from us.
This will enable us to give you the best advice and will protect you from tax, penalties and interest in case we give you erroneous information.