Federal agencies use the North American Industry Classification System (NAICS) to classify businesses when collecting, analyzing, and publishing statistical data about the United States economy. This numeric coding system is also used for administrative, regulatory, contracting, and taxation purposes. 

When you register your business with Virginia Tax, you will need to provide the appropriate NAICS numeric code. You may also need to provide the code on some tax returns and applications for tax credits. 

To determine the NAICS code for your business, go to NAICS on the U.S. Census Bureau's website.