How to correct a previous years trial balance?

The last account year was my first year using quickbooks so i made some mistakes re how i recorded payroll. Instead of matching the transactions i created a separate payroll account to log the wages so in effect the journal entries detailing payroll were just left sitting there.  This has created the bank balance on the balance sheet to be incorrect. My accountant has fixed it for year ending 31st October 2020 however because the balance carries over it is also throwing out this years accounts. Is there any way i can correct the start balance on 1st November 2020 so that this year isn't out? If i undo the payroll from previous years it throws out my reconciled accounts.