Fill out the Homestead Tax Credit, 54-028 form. Return the form to your city or county assessor.The Homestead Credit is available to all homeowners who own and occupy the residence. Fill out a blank form (see following pages). 3. The annual deadline is July 1. Any applications submitted after July 1 will be applied to the following tax year. New applications for homestead tax credit are to be filed with the Assessor on or before July 1 of the year the credit is first claimed. Use our Online Property Search and enter your address complete the application using the Homestead Tax Credit link at the bottom of the page. Iowa law provides for a number of credits and exemptions. Family Farm Tax Credit Sign up deadline: November 1.