The "Supplemental" information does not get filed with the IRS or State.
It is there to help you, potentially, reduce your state taxes....for the state shown....but you were apparently in a different state in 2022, so the CA information is useless to you.
IF you cannot find sub$$-amount of box 12, which was issued by your proper resident state's bonds, you will just enter your 1099-DIV as it is, and there is a follow-up page after the main 1099-DIV form (in the software) that asks what state the box 12 $$ came from....and you go to the end of the list of states and just select "Multiple States" (or for desktop software, it has "More than one state" as the equivalent selection)
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When you file next year, and if you are living in an income-taxing state now, that supplemental information may help you reduce your state taxes (presumably they will change the supplemental information to indicate what sub-portion of the box 12 $$ came from bonds issued by your new state....now that you have informed them of your new state and address)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
