Visit one of office locations to complete the Business Property Statement. You will be asked to present valid government-issued photo ID when you arrive.Tax Collection Forms. Why must sales tax and freight and installation costs be included in the reported cost? Get help with your San Diego County property taxes. Contact our Property Tax Services office for assistance. For information regarding property taxes, penalties due, payment options, and payment status, visit the San Diego County Treasurer-Tax Collector's website. Obtain forms from either the County Assessor or the Clerk of the Board in the county where the property is located). Gov for information. Other records that could be helpful in completing the Form 571-L are the California.