Utah law requires that you notify the county when you have property on which you have claimed the homeowner's exemption to which you are no longer entitled. Ada County Homestead Exemption Application Form, fill out to apply for exemption fill out on line and turn into the Assessors office.Application for Exemption Instructions Details on how to fill out and mail your Property Taxation Exemption Form , PDF: Application for Exemption Property Tax. A property tax exemption is like a discount applied to your EAV. If you qualify for an exemption, it allows you to lower your EAV. Depending on your disability rating, income and the state you live in, you may be able to receive a partial or full property tax exemption. Here are the details: How to file for a Primary Residence Exemption: Step 1. Download and fill out a Primary Residence Application (PDF) Have you recently applied for an exemption online? Please wait 8-10 weeks.