Once you've decided to take your grievance about an attorney to the State Bar, you need to file an attorney complaint form. For questions call 800-843-9053.The document provides instructions for filing a complaint against an attorney with the State Bar of California. Instructions for Filing a Complaint Against a California Attorney. Fill out all spaces on the California Attorney Complaint Form completely. The form asks you to provide a clear statement of the problem you are having. In this statement, include important information and relevant dates. The first step in filing a grievance is to complete a grievance form either through the Bar's online submission system, located at cdc.texasbar. More information is needed to adequately answer your question. Instructions for Filing a Complaint Against a California Attorney.