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California should send you a letter explaining it in a couple weeks.  Does it look official?  It might be fake or a scam.  You don't recognize the amount as anything?  It's not for the CA Middle Class Tax Refund?  I assume you meant you got the 2021 Direct Deposit in 2022 when you filed.  Could it be a small amount like for interest?  Or you left off an estimated payment you made or an extension payment or applied your 2020 refund to 2021?  Could be lots of reasons.