WA has no state income tax. You say you are doing volunteer work--do you mean you are not being paid at all? If you have no income in the state (what state?) you are volunteering in, then you do not need to file a state return there either. Provide some more information--why are you worried about what state to say you live in? If you just need to know what to put on your federal return for your address--use the address where you want to receive mail from the IRS.
Have you had any income during 2019?
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
