Auto Parts. According to the tax classification and coding query, construction site safety reflective stickers belong to the auto parts tax coding category. Tax type tax code, also known as "tax classification code", refers to the tax classification and coding of goods and services. It is established in the value-added tax invoice issuance system. When the taxpayer issues an invoice, the goods on the invoice must be verified by the State Administration of Taxation. The tax code is associated, and invoices are issued according to the tax rate and collection rate indicated on the classification code.