U.S. companies should not withhold taxes from money paid to independent contractors working overseas. Beginning July 2013, withholding tax returns and withholding tax payments must be filed and paid electronically using one of our three online systems.Exclusions from gross receipts are set out in Fairfax County Code, Section 4-7.2-1(b) and Code of Virginia, Title 58.1. Who is require to withhold? • Withholding Agent. Regulation 18: Contractors And Subcontractors. Fairfax County, Virginia - All business owners, including owners of home-based businesses, are subject to the BPOL tax. Prizes and Awards, which when paid to non-U.