Application for Exemption Instructions Details on how to fill out and mail your Property Taxation Exemption Form , PDF: Application for Exemption Property Tax. New homeowners must submit a residential property declaration to the county assessor within 90 days of receipt of the form.In order proceed to the Residential Exemption form, please enter your parcel ID number and PIN that was supplied in the notification letter. The Salt Lake County Auditor's Office has designed a public web Portal to facilitate the Property Tax Exemption application and annual renewal process. Typically, you'll need to fill out a homestead exemption application with your county tax office. Most homeowners in Utah qualify for a homestead exemption on their property taxes. Step 1 - Online Property Tax Payments. Salt Lake County hopes that you find paying your property taxes online a quick and simple process. All offices are open am – pm Monday Through Friday. All customers are encouraged to complete their transactions online, rather than in person.