Follow the below steps to create a reversal for the BPN:
From the Main Menu go into General Postings.
Select BPN.
Tick the Reversal box.
Select NEW.
Insert the correct Nominal code and then select the original posting done in the box.
Select the Floppy Disk Icon to save.
Select the TABLE tab and check all the details on the posting are correct.
Select POST.
If the BPN can't be reversed as it is reconciled, then do the below for a BRN reversal:
From the Main Menu go into General Posting.
Select BRN.
Select NEW.
Insert the correct Nominal Code and fill in the details checking the VAT code is the same as the original transaction.
Select the Floppy Disk Icon to save.
Select POST.