W. Va. Code § 11-15-9
(a) Exemptions for which exemption certificate may be issued. — A person having a right or claim to any exemption set forth in this subsection may, in lieu of paying the tax imposed by this article and filing a claim for refund, execute a certificate of exemption, in the form required by the Tax Commissioner, and deliver it to the vendor of the property or service in the manner required by the Tax Commissioner. However, the Tax Commissioner may, by rule, specify those exemptions authorized in this subsection for which exemption certificates are not required. The following sales of tangible personal property and services are exempt as provided in this subsection:
(6) Sales of tangible personal property or services to a corporation or organization which has a current registration certificate issued under §11-12-1 et seq. of this code, which is exempt from federal income taxes under Section 501(c)(3) or (c)(4) of the Internal Revenue Code of 1986, as amended, and which is:
(F) For purposes of this subsection:
(i) The term "support" includes, but is not limited to:
(21) Sales of electronic data processing services and related software: Provided, That, for the purposes of this subdivision, "electronic data processing services" means:
(23)
(24) Food for the following is exempt:
(38) Sales of primary opinion research services when:
(C) The transfer of the results of the service activities is an indispensable part of the overall service.
For the purpose of this subdivision, the term "primary opinion research" means original research in the form of telephone surveys, mall intercept surveys, focus group research, direct mail surveys, personal interviews, and other data-collection methods commonly used for quantitative and qualitative opinion research studies;
(39) Sales of property or services to persons within the state when those sales are for the purposes of the production of value-added products: Provided, That the exemption granted in this subdivision applies only to services, equipment, supplies, and materials directly used or consumed by those persons engaged solely in the production of value-added products: Provided, however, That this exemption may not be claimed by any one purchaser for more than five consecutive years, except as otherwise permitted in this section.
For the purpose of this subdivision, the term "value-added product" means the following products derived from processing a raw agricultural product, whether for human consumption or for other use. For purposes of this subdivision, the following enterprises qualify as processing raw agricultural products into value-added products: Those engaged in the conversion of:
(b) Refundable exemptions. — Any person having a right or claim to any exemption set forth in this subsection shall first pay to the vendor the tax imposed by this article and then apply to the Tax Commissioner for a refund or credit, or as provided in §11-15-9d of this code give to the vendor his or her West Virginia direct pay permit number. The following sales of tangible personal property and services are exempt from tax as provided in this subsection: