Please note that this article is not updated for changes that can and will happen from time to time.
Washington has no State Income Tax. There for there is no State Agency to oversee withholding deposits and reports. There are no State W2's to file, no supplement wage withholding rates and no State W2's to file.
Not all states allow salary reductions made under Section 125 cafeteria plans or 401(k) to be treated in the same manner as the IRS code allows. In Washington cafeteria plans are taxable for unemployment insurance purposes. 401(k) plan deferrals are taxable unemployment purposes.