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It seems you are asking for information on how to become a resident of Washington.

According to Access Washington, a state government website, in order to become a resident, "simply take some action that proves you intend to live in the state on more than a temporary or transient basis". http://access.wa.gov/living/resources/residency.aspx

This is the definition of a state resident as provided by the Washington Department of Revenue. http://dor.wa.gov/Content/ContactUs/con_residdef.aspx

I hope this is able to answer your question. If you need further information, I suggest consulting your local library.