Bank Rec

I made a cash deposit into Quickbooks in August of 2024 for1 months office rent and it was never accounted for in that year thus my accountant only entered 11 months of rent for that year. It is still showing up as a deposit on my August 2024 bank reconciliation with no account to associate this with. If I associate it to office rent which is really where it should be, I will be upsetting the 2024 Balance Sheet, P&L, and Tax Return for that year which has already been filed. How do I fix this