The following links provide information and technical guidance for software developers and transmitters who are interested in developing software for California's business e-file program. We've provided the XML Schemas, business rules and technical documentation.
Tax Year 2006 Archived XML Schemas for CA Forms 100/100S and associated forms and schedules.
Tax Year 2006 Archived XML Schemas for CA Forms 565/568 and associated forms and schedules.
Tax Year 2005 Archived XML Schemas for CA Forms 100 and associated forms and schedules.