PDFRCW 50A.50.200
Remedies exclusive.
The remedies provided in this title for determining the justness or correctness of assessments, refunds, adjustments, or claims shall be exclusive and no court shall entertain any action to enjoin an assessment or require a refund or adjustment except in accordance with the provisions of this title. Matters which may be determined by the procedures set out in this title shall not be the subject of any declaratory judgment.