@tax_bak
This doesn't constitute any tax or legal advice but my impression after doing research previously is that CA is pretty aggressive and does not let you abandon it as a domicile very easily.
It will depend on a lot of factors, and the fact that the rest of your family is in CA and you return frequently there would probably be used against you by the FTB.
Other factors to be weighed are: do you own real estate in CA? Do you have local bank or credit union accounts in CA? Are most of your other family in CA? Are you still registered to vote in California? Do you have the appearance that you would intend to return to CA if you leave your job in WA?
This sounds like it's a complicated arrangement due to the fact that the rest of your family is still in CA, so you might to talk with a tax attorney in CA regarding what the proper classification for you would be or what your options are.
The safest option for you would be to sever virtually all ties to CA but that doesn't seem to be an option unless your wife finds work in WA.
