Client recently received letter concerning original 2022 state individual income tax return, where Pa acknowledges the refund that was applied or credited to 2023, and apparently are going to pay him (or apply amount to his account) interest on this overpayment applied.  Original 2022 return was filed last year. I cannot recall any client receiving interest on a refund applied to succeeding year. Has anyone else seen this either in Pennsylvania or any other state? Thanks.