It is measured on the value of products, gross proceeds of sale, or gross income of the business. Currently, combined sales tax rates in Washington range from 6.5 percent to 10.4 percent, depending on the location of the sale.Sales tax: There's a 6.5 percent state tax on many, but not all, consumer goods and services. Contractors working in Idaho are subject to Idaho sales, use, and business income taxes, as well as income tax withholding. The Comptroller's Office issues sales and use tax exemption certificates to qualifying organizations and is renewed every five years. Taxpayers can complete transactions on MyTax DC or call 202-727-4TAX. Virginia has reciprocity with several other states. The decision allows states to require out-of-state businesses without a physical presence to collect and remit tax on sales from transactions in their state. A complete listing of state tax forms and filing options. It's like introducing your business to the tax authorities, so make sure to make a good impression!