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. NOTE: Do not write in 1-inch margin. 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. Complete the Homestead Declaration form. The form must be printed legibly in black ink. You can apply for this in person at the Assessor's Office or online. Douglas County has additional exemptions. Pre-populated Homestead Tax Credit Application Forms are available to be printed from within your parcel on our website.