If you want to know about California tax law, and you have three options:

A) An article on Investopedia, that has a section about taxes in general, but not about California tax in particular.

B) A comment from someone on HN talking specifically about California tax law.

C) A publication by the California Franchise Tax Board.

Which would you pick?

If you chose B, check out my earlier comment.

If you chose C, check out https://www.ftb.ca.gov/forms/misc/1004.html

Not sure why you would choose A, as it's neither specific to California taxes, nor is it an authority.