Posting Subsequent Debit/Credits 
Use
You want to post an invoice or a credit memo for subsequent charges in which all the items are subsequent debits/credits.
Prerequisites
You can only enter a subsequent debit or credit for a purchase order item that you have already posted an invoice for.
Procedure
The Enter Invoice screen appears.
. The system proposes the invoice items.All invoice items that an invoice has already been posted for are selected by default. The default quantity is the total quantity invoiced without a value.
Post.If the balance is zero, you can post the document.

Account Movements When Subsequent Debits/Credits Are Posted
The account postings for a subsequent debit/credit depend on the quantity that the subsequent debit/credit applies to:
Account Postings Made when an Invoice Is Posted as a Subsequent Debit:
