Wash. Rev. Code § 82.14.532
(1) Subject to the requirements of chapter 35.107 RCW and RCW 81.104.170, a project is eligible for a sales and use tax remittance under the authority of this chapter on:
(2)
(7)
(b) Persons applying for the remittance as an assignee must provide the department the following documentation in a form and manner as provided by the department:
[ 2021 c 145 s 16; 2019 c 273 s 11.]