Senior citizens (age 65 and older) and surviving spouse applications may be filled out and either submitted online or printed and mailed. Mail applications to: Karl L. Keith, Montgomery County Auditor 451 W.Disabled applicants must complete form DTE 105E,. The homestead exemption allows lowincome senior citizens and permanently and totally disabled Ohioans, to reduce their property tax bills. Online: Go to Homestead Tax Credit Eligibility Application page, and complete the online form. Filing an online application will be faster than mailing one in. DAYTON, Ohio (WDTN) The deadline is approaching for homestead exemption applications. In 2020, 764,000 Ohio properties got a homestead exemption, according to the Ohio Department of Taxation. To qualify, you must both own and occupy your home as of January 1. Please read the instructions before completing this application.