RCW 82A.04.420: Allocation and apportionment—Pass-through entities—Pro rata share.

(1) Income derived from sources within this state include an apportioned share of the individual's distributive share of income, gains, losses, and deductions from pass-through entities that operate in the state, as provided in subsection (2) of this section.

(2) The allowable modifications and credits under this chapter for partners, members, or shareholders of a pass-through entity are computed by including a pro rata share of the Washington base income and the credits allowed under RCW 82A.04.110 through 82A.04.130, if the modification or credit relates to the income of the pass-through entity. Each member's, partner's, or shareholder's pro rata share of a modification or credit is the amount of modification or credit based on the pro rata share of net income or loss on a member's, partner's, or shareholder's federal schedule K-1 form.

(3) For purposes of this section, "pro rata share" means pro rata share as reflected on the member's, partner's, or shareholder's federal schedule K-1 form.