This local option prevents any large shift of the property tax burden to the residential class of property owners after a revaluation. Exemption applications must be filed with your local assessor's office.See our Municipal Profiles for your local assessor's mailing address. We have experienced exemptions staff ready and willing to assist you in completing your forms. Douglas County has additional exemptions. Learn more about exemptions and deferrals for senior citizens, persons with disabilities, and disabled veterans. Find out how to qualify and apply. Application for Property Tax Exemption.