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. You must file between February 1 and June 30 EVERY YEAR in the Assessor's office. Homestead exemption applications must be filed annually between February 2 and June 30. Application forms are typically available beginning February 2. President Abraham Lincoln signed the Homestead Act on May 20, 1862. Q: What do consumers do to get the credit(s)?