Many service companies include sales taxes when they perform inspections, testing, and certifications. Charging sales tax on these services is incorrect. It is easy to understand how this can happen since the tax code has clearly omitted inspections, testing, and certifications in the state's definition of a "sale at retail" found in the Registered Code of Washington RCW 82.04.050 paragraphs (2)(a) through (2)(h). The determining criteria to be used when specific services are not identified as a "sale at retail" is as follows: Has the service been performed for the management or the owners? Will management and/or the owner use the information to comply with regulated standards? And does the information gathered report the status, condition, and/or certification of the systems being reviewed? If these apply, then the service was performed for management and is not a "sale at retail". If however, any aspects of the system was repaired or replaced as a part of the inspections, testing, and certifications process, then the service would be a "sale at retail". The difference being that tangible personal property was modified in some way and the service was not only to provide management with information on its status.