Unemployment compensation
Apparently, my son must repay unemployment compensation that was overpaid in 2021. Since taxes were paid on it in 2021, can a credit be requested when it is repaid? If yes, does the 2021 return need to be amended or can the credit be applied in the year that the overage is repaid, like 2023? If on the 2023 return, how do we ask for the credit?