Washington Revised Code Title 64. Real Property and Conveyances § 64.37.020. Taxes

Short-term rental operators must remit all applicable local, state, and federal taxes unless the platform does this on the operator's behalf. This includes occupancy, sales, lodging, and other taxes, fees, and assessments to which an owner or operator of a hotel or bed and breakfast is subject in the jurisdiction in which the short-term rental is located. If the short-term rental platform collects and remits an occupancy, sales, lodging, and other tax, fee, or assessment to which a short-term rental operator is subject on behalf of such operator, the platform must collect and remit such tax to the appropriate authorities.