According to our records, this business is located at 5435 Clayton Rd # K in Clayton (in Contra Costa County), California 94517, the location GPS coordinates are: 37.9519981 (latitude), -121.9568408 (longitude). H & R Block Tax Service is categorized under Tax Return Preparation and Filing (SIC code 7291). Known organization manager is William Telfer. Current estimates show that the unit has a sales volume of $285,000 and staff of approximately 15 people. You can contact the company by phone at (925) 672-1020; the following fax number is also provided: (925) 672-2039. Business website can be accessed at www.hrblock.com.