As a California resident, you will have to pay CA income tax on your income earned in WA.
The general rule is: your report all your income on your home state return, even the income earned out of state. You file a non-resident state return for the state you worked in and pay tax to that state. Your home state will give you a credit, or partial credit, for what you paid the non-resident state.
Since WA does not have an income tax, you do not have a non-resident return to file. But you still have to pay tax on that income to your home state.
