2023 Application for Property Tax Relief. Documents. Contact Information.The forms must be filed with the Sarpy County Assessor's Office between Feb. 2, 2023 and June 30, 2023. Select all exemption(s) for which you are applying: Basic Homestead Exemption. Ada County Homestead Exemption Application Form, fill out to apply for exemption fill out on line and turn into the Assessors office. We encourage anyone who notices that an update needs to be made to fill out the contact form on this page and let us know. Tax Exemption Certificate for Military Spouse. AR-OI. Loan Assistance Tool.