More and more California Superior Traffic Courts are moving to online systems to supply your traffic school due date. The traditional method was for the court to mail you your due date 2-3 weeks after you pay your traffic violation fine and state fee that lets you take traffic school. Many California Superior Courts continue to do that, and some do that only for those who pay their fines by check.
In contrast, if you pay online, then you will likely get an email giving you your due date. All of this assumes that you (1) paid your violation fees and (2) are eligible to take traffic school in California.
Your best bet it is consult the Traffic Court webpage of the California court in the county where you received your traffic violation. You can also call us at 877-883-729 and we will be happy to help you figure it out.