W. Va. Code § 11-13mM-5
(b) Definitions – The following definitions apply to this section:
(2) “Related entity” means:
(D) A member of the same controlled group as the taxpayer.
For purposes of this section, “control”, with respect to a corporation, means ownership, directly or indirectly, of stock possessing fifty percent or more of the total combined voting power of all classes of the stock of the corporation which entitles its owner to vote. “Control”, with respect to a trust, means ownership, directly or indirectly, of fifty percent or more of the beneficial interest in the principal or income of the trust. The ownership of stock in a corporation, of a capital or profits interest in a partnership or association or of a beneficial interest in a trust shall be determined in accordance with the rules for constructive ownership of stock provided in section 267(c) of the United States Internal Revenue Code, as amended: Provided, That paragraph (3) of section 267(c) of the United States Internal Revenue Code shall not apply.
(d) Application of credit against personal income tax and corporation net income tax. – The amount of credit determined under this section is allowed as a credit against 100 percent of that portion of the taxpayer’s state income tax liability and applied as provided in subsections (1) and (2), and in that order.