Please see this answer from AndreaC5:
Every payer of the retirement distribution does not obtain payer numbers for every state. If your payer has one for your state and they have withheld any state income tax, it would be listed in box 13 on the 1099-R. If there is nothing listed in the State Payer number box (box 13), you can input NA (not available) in that box in the TurboTax software.
If you have state income taxes withheld by your employer and there is an amount in box 12 on the 1099-R, contact the issuer and have them to send you a corrected 1099-R with the state payer’s number included.
