17 N.C. Admin Code 05G .1003 - Assignment of Receipts
The location of delivery of professional services shall not be determined by a general rule of determination, but shall be reasonably approximated. The assignment of receipts from a sale of a professional service depends on whether the customer is an individual or a business customer. When the taxpayer, acting in good faith, cannot reasonably determine whether the customer is an individual or a business customer, the taxpayer shall treat the customer as a business customer. For purposes of assigning the receipts from a sale of a professional service, a taxpayer's customer is the person that contracts for the service, irrespective of whether another person pays for or also benefits from the taxpayer's services.