From the North Carolina DOR notice
The North Carolina General Assembly enacted legislation that reduces the general State rate of sales and use tax from 4.5% to 4.25% effective December 1, 2006 and from 4.25% to 4% effective July 1, 2007. Therefore, effective December 1, 2007 2006 the general State rate of sales and use tax will be 4.25%. Effective July 1, 2007, the general State rate will be 4%. Items subject to the general State rate of sales and use tax are also subject to any applicable local rate of sales and use tax. All counties levy a 2.5% local sales and use tax; Mecklenburg County also levies an additional .5% local tax for public transportation.