Can the county assessor prorate assessments or taxes between the buyer and seller of taxable personal property? Obtain forms from either the County Assessor or the Clerk of the Board in the county where the property is located).Secured Property Tax (ex. When completing the form you must: • List all assets you own or control as of January 1, including those assets fully depreciated in your. The Treasurer and Tax Collector mails the Annual Secured Property Tax Bills each year in October to every owner listed on the Secured Tax Roll. Property Tax Bill Types. 1. Check the 'I agree' box and click on 'Submit' to complete your automatic payment plan enrollment. A confirmation message will appear. Property taxes are one of the oldest forms of taxation. Please Download PDF BOE-260-B REV.