This can be done once you determine the most appropriate operating structure for your business, and have determined its name. All documentation must be approved by the State of California before the business can become a legally-recognized entity.
If you plan to conduct business under a name that does not contain the surname of any and all owners, or is a corporation that will do business under a different name than is registered with the State, you will need to file a Fictitious Business Name Statement with the County of Sonoma Clerk-Recorder's Office.
This application must be filedwithin 40 daysof business start date.