In order for the system to be able to track documents with deferred taxes correctly, you must post all such documents observing the following rules.
You can post deferred taxes in the following types of accounting document:
Invoices
Credit memos
Payments
Clearing documents
Down payments
Down payment clearing documents and their reversal documents
You cannot post deferred tax items in documents that contain both customer items and vendor items.
You cannot post a down payment with reference to more than one down payment request.
If a customer pays an invoice in several payments, you post the first payment with reference to the invoice, and post the amount outstanding as a residual payment. You post subsequent payments as partial payments.
You post bills of exchange with reference to an invoice: The Deferred Tax Transfer program does not recognize bills of exchange that you post without any invoice reference, even if you clear a bill of exchange against an invoice later on.