Nebraska Homestead Exemption. Nebraska Homestead Exemption Application, Form 458.The homestead can't exceed one acre in a city or 160 acres in a rural area. Volunteers Assisting Seniors will be at the following locations to help fill out your Homestead Exemption Application. This service is free. Douglas County has additional exemptions. Homestead exemption applications must be filed annually between February 2 and June 30. Application forms are typically available beginning February 2. Nebraska Homestead Exemption applications must be filed with local county assessors between Feb. The regular filing deadline is February 15th to receive the full exemption.