Cal. Rev. & Tax. Code § 468

In addition to any other remedies described in this article, if any person fails to furnish any information or records required by this article upon request by the assessor, the assessor may apply to the superior court of the county for an order requiring the person who failed to furnish such information or records to appear and answer concerning his property before such court at a time and place specified in the order. The court may so order in any county where the person may be found, but shall not require the person to appear before the court in any other county than that in which the subpoena is served.