To apply for an exemption, fill out the 2024 Loudoun County Tax Relief Application (PDF) and submit the supporting documents. You may be eligible for real property tax relief in most Virginia cities and counties if you are 65 years old or have a disability (regardless of age).At the discretion of each city or county, elderly homeowners may be eligible for property tax exemptions. The program exempts a portion of the property taxes. The person or persons claiming exemption must be 65 years or older on December 31 of the year immediately preceding the taxable year. To claim a tax exemption, an application must be filed annually with the City's Tax Relief Official. 1 and June 1 of each year. To claim a tax exemption, an application must be filed annually with the City's Tax Relief Official.