Washington state’s newly signed income tax  on high earners is already facing a legal challenge, with critics arguing it violates the state constitution and could hit small businesses. The measure implements a 9.9% tax on income of $1,000,000 or more for individuals and households, marking a major shift for a state that has resisted traditional income taxes . The law that established  the tax  was passed on March 11 and was signed by Washington Gov. Bob Ferguson on March 30. While the tax was