Fill out the Homestead Tax Credit, 54-028 form. Return the form to your city or county assessor.Eligible claimants who are 65 years of age or older on or before January 1 of the assessment year are now eligible for a homestead tax exemption. Iowa law provides for a number of credits and exemptions. Address: City: State: ZIP: Phone: Answer these questions to determine eligibility: 1. Are you currently an Iowa resident? Pre-populated Homestead Tax Credit Application Forms are available to be printed from within your parcel on our website. The Iowa Department of Revenue has amended the Homestead Tax Credit and Exemption form (54-028) to allow claimants to apply for the new exemption.