Tangible personal property used in research and development business . All Arlington County businesses must file a Business Tangible Personal Property Return each year on or before May 1.Business Personal Property tax is an ad valorem tax on the tangible personal property that is used for the production of income. Tangible personal property tax exemptions for small businesses is a highly economical way of reducing taxpayer compliance burdens. Please use the Tax Portal or the Business Personal Property Return below to file your annual business personal property return before the April 15th due date. View Tax History; Report a Name Change. Note: Figure the amount of your contribution deduction before completing this form. See your tax return instructions. DTA uses that data to annually assess real property in a fair and uniform manner at estimated fair market value as of January 1 of each year. Our mission is to deliver the best customer experience and value in real estate, acquisition, and technology services to government and the American people.