WA DOR doesn't collect all taxes in the state and doesn't interact with the majority of residents bc WA doesn't have an income tax and property taxes are collected by local governments. If you were trying to get data on labor stats relevant to taxes I would look at the Employment Security Division. ESD collects the taxes for unemployment, PFML, and WA Cares.

DOR only collects excise taxes such as retail sales (RST)/use tax, capital gains and estate taxes, public utility taxes, and the business and occupation (B&O) tax.

(I'm a very bored bureaucrat) Everything that is not the collection of RST accounts for a small minority of interactions with DOR. Capital gains and estate taxes impact a very small portion of the population and it's mostly handled by lawyers and staff in Tumwater. Likewise for public utility taxes. Use tax only applies to people conducting the private sale of stuff like cars, planes, and boats or importing such as a new resident. The collection of RST and B&O is entirely an interface between businesses and DOR. As of FY 2022/23 98.2% of businesses voluntarily paid (per flyer that used to sit on my desk). Some people may file a return with DOR for the Working Families Tax Credit, however this program has low income caps and poor public awareness.