CALIFORNIA SALES TAX REGULATIONS
Some states charged tax based on the destination, and other states charge tax based on the origin. California is a state that charges tax based on the origin, so since we’re shipping from California and our business address is in California we collect and pay taxes according to our state laws, no matter where we ship to. This is required by law.
You can find many articles online confirming this information, by using your search engine to search “Why does california charge tax based on the origin taxes?”
Here is one article: https://www.avalara.com/us/en/learn/whitepapers/origin-vs-destination-sales-tax.html
