Most employers will give you their reason for terminating you, often in a dismissal letter or other written communication, and sometimes verbally. If they have not given you a reason, then you can contact your supervisor, human resources, or other relevant person from the company and ask them to see what reason(s) they will share.
There may be other reasons you believe you were terminated that are not necessarily the reasons the company has told you led to your termination. Both the reason the company has given you for your termination, as well as the reason you believe you were terminated, can be shared with an attorney to see if you have a basis for a wrongful termination claim.
California Law prohibits firing an employee based on discrimination and harassment based on their protected class, or in retaliation.
Read more about wrongful termination >>