How do I reverse an incorrect Charge made on a Debtors Master statement in Apex?

How do I reverse an incorrect Charge made on a Debtors Master statement in Apex?

In order to correct an incorrect charge manually created on the Debtor Master the below steps needs to be followed:
1. Debtors Masters
  1. To correct a Charge, you will need to post a "Charge Correction" against the incorrect line item. Please ensure that the "Charge Correction" code exits by navigating to Administration -> AR Codes -> Debtors Posting Codes.
  1. Ensure that the "Charge Correction" code details have been completed especially if it needs to be associated with an accounting system and general ledger numbers are required. Thereafter ensure that the "Revenue Group" is set as a discount or payment seeing that this will reverse the charge. 
  1. Next navigate to the Debtor Master statement where the correction needs to take place. 
  1. Select the line item and click on the "Post" button. 
  1. Continue to enter the Property Code, Posting Code (Charge Correction), Amount that needs to be corrected, the line item where the amount needs to be, as well as the reference.
  1. Please ensure that your ageing date matches the ageing date on the Item line you wish to correct.
  1. Next click on the "Save" button.
  1. The amount will now have been reversed and the correct charge can by added by clicking on the "Post" button and adding the details as normal.