Fill out the Homestead Tax Credit, 54-028 form. Return the form to your city or county assessor.On this page, forms for these credits and exemptions are included within the descriptions. This application must be filed or postmarked to your city or county assessor on or before July 1 of the year in which the credit or exemption is first claimed. As a Veteran, you are entitled to one Disabled. Veteran Homestead Tax Credit in the state of Iowa. Following is a list of several credits and exemptions available in Iowa. A claim is allowed for successive years without further filing as long as eligible. Form: Homestead Tax Credit Application 54-028. The property exemptions created under this Code shall not be claimed against the following debts: 1.