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.Just click on the link above it will download a PDF. File your Business Tangible Personal Property (BTPP) tax return online HERE or download a printable copy of the return HERE to submit a hard copy. For each piece of business property or equipment, please include the original purchase price (cost or cost to aqcquire), a brief description, and the year of. You must complete the fixed asset schedule annually or provide a detailed asset listing showing all business assets.