Nebraska Homestead Exemption. Nebraska Homestead Exemption Application, Form 458.How to Apply for Homestead Exemptions Homestead applications must be filed with the county assessor after February 1, and on or before June 30 of each year. Download this form to apply for a residential homestead exemption. Homestead exemption applications must be filed annually between February 2 and June 30. Application forms are typically available beginning February 2. In Collin county, it's just a form you mail in or submit in person. The most common is the homestead exemption, which is available to homeowners in their primary residence. Washington County is located in eastern Nebraska on the Missouri River. Overview of Nebraska Taxes.