On or before March 1st- Natural Resources declarations must be returned to the Assessor's OfficeOn or before April 15th- Personal Property and Oil & Gas declarations must be returned to the Assessor's OfficeMay 1st- Notice of Valuation (NOV) Real Property are mailed to tax payersMay 1st through June 1st- Tax payers may question Real Property Valuations to the AssessorJune 1st- NOV's for Personal Property, Oil & Gas, and Natural Resources are mailed to taxpayersJune 15th through July 5th- Taxpayers may question Personal Property, Oil & Gas, and Natural Resouces valuations to the AssessorOn or before July 15th- Taxpayers appeal to the County Board of Equalization the Assessor's value on Real PropertyOn or before July 15th- Senior Citizen Exemption applications must be submitted to the AssessorOn or before July 20th- Taxpayers appeal to the County Board of Equalization the Assessor's value on Personal Property, Oil & Gas, and Natural Resources