***Beginning July 1, 2019 sales tax will be collected on all items sold or delivered within the state of Washington. Washington State law no longer grants exemptions at the time of purchase.***
All customers having items shipped to Washington State addresses are subject to Washington State sales tax. Out-of-state residents from eligible states will be able to request a remittance from the state if they have receipts that show they paid at least $25 in state sales taxes in the previous year. Please see the state website for more details.
https://dor.wa.gov/find-taxes-rates/retail-sales-tax/sales-nonresidents
US States:
Oregon, Alaska, Montana, Colorado, Delaware and New Hampshire
Canadian Provinces:
Alberta, Northwest Territories, Nunavut, Yukon
Other:
American Samoa