You must file your homestead exemption application with your county tax officials. The deadline for filing an application for a homestead exemption in Montgomery County is April 1.To receive the benefit of the homestead exemption, the taxpayer must file an initial application. Welcome to Montgomery County, Texas. The only Homestead Exemptions available in Montgomery County are the Standard State Homestead Exemptions. GENERAL INFORMATION: Property owners applying for a residence homestead exemption file this form and supporting documentation with the appraisal district in. You may apply for homestead exemption in the Tax Assessor's office. To qualify, you must both own and occupy your home as of January 1. This is the application in pdf form. The homestead application is normally filed at the same time the initial tax return for the homestead property is filed.