Do I have to pay any state taxes for work done in Washington (state) even though I live and work in MD?

[Coleen3]

No, there is no income tax in Washington state

Washington state does not have a personal or corporate income tax. However, people or businesses that engage in business in Washington are subject to business and occupation (B&O) and/or public utility tax. The business’s gross receipts determine the amount of tax they are required to pay.

https://dor.wa.gov/find-taxes-rates/income-tax