If you lived in WA all of 2023, you don't need to file a state return, unless you have a situation described in the help article below. You only need to file a federal return for 2023. You should not have paid CA tax last year, if you resided in WA all year. It is understandable that you would have paid tax to CA on your 2021 tax return, since you lived there at that time. Unearned income is sourced to your resident state.
Reasons why you would need to file a nonresident return - do any of these apply to you?
How to file if you moved to a different state during the tax year - when did you move from CA to WA?
How to file an amended state tax return - If you did not live or work in CA at all in 2022, you can file an amended CA return to recoup those taxes paid while you were a resident of WA.
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