You can link customers and suppliers together to post contra transactions in either ledger. Follow the steps below to set up the relationship, then process the contra entry.
Open a Customer or Supplier record.
Click Settings.
Scroll down to the Contra Settings section at the bottom.
Click New Contra.
Enter or select the appropriate Supplier or Customer code, depending on which ledger you are currently in.
Click Save.
Once the relationship is set up, use the following steps to process the contra transaction.
Click Debtors or Creditors.
Click Transactions, then click Contra Adjustment.
Search for the Customer, Supplier or both.
Click the pop over button (blue ellipsis button) under the Customer Code or Supplier Code in question.
Click Process Contra.
Select the appropriate transactions.
Amend the Allocated Value field to ensure they balance.
Click Process to create the transaction, then enter the required Analysis Code.
Typically, a Discount type analysis code is used for a contra posting.