Follow the steps below based on the module view you are using—Classic View or Modern View.
Knocking off a bill - Classic View
Go to Transactions, Open Item Menu, Debtor, Knock-off Bills.
Enter the Account No. and press Enter.
Double-click the Payment and Invoice, click the blue arrow next to the amount, and then Accept.
Knocking off a bill - Modern View
For Debtors:
Go to Banking.
Click Received Payments, Open Item Menu, Knock Off/Reverse Bills.
For Creditors:
Go to Banking.
Click Pay Bills, Open Item Menu, Knock Off/Reverse Bills.
Reversing a bill - Classic View
Go to Transactions, Open Item Menu, Debtor, Reverse Bills.
Enter the Creditor No. or Reference No., press Enter, and then click Reverse.
For this issue, please check under Transactions, Open Item Menu, Debtor, Maintain B/F Bills to verify whether the B/F bills are maintained. If not, you may need to add and maintain them.