Would anyone know the answer to this question. This is for my nephew who moved to CA for job opportunity. His wife lives and work in WA. Both CA and Washington are community states. In this case, would the one in CA be forced to pick up half of the income from Washington state and pay tax? Effectively taxing all CA sourced income and 1/2 of income of the spouse in WA. Can they file MFJ on Fed and MFS on CA? Is there anyway to avoid having to pay tax on nonresident spouse income in CA? Thank you for your help.