Is it legal for your parents to take away your passport and ID?

OK so if the passport is in your name and you are over the age of majority, then there is no lawful right that your parents have to confiscate something that belongs to you. If they have taken this without your permission, that is a crime, and you could contact the Police department and file a police report. If that legal step does not result in anything, then you could file a lawsuit in court to have them return what they have wrongfully taken from you. This would require you to file an action in Municipal Court in California for a writ of replevin, to return an item of personal property that has been wrongfully taken. In your lawsuit in addition to recovering your passport, you could also ask the court for attorneys fees, Court costs, and any damages that you have incurred like motel and airplane fees expended for travel that cannot be refunded.