VAT relevant transactions from simple to complex

Standard SAP VAT determination logic and functionality do not work for complex dynamic business models.

The root cause is that both Standard SAP and bold-on tax engines exclusively focus on transactions within a single company; it only assesses the underlying individual transactions and fails to link the current transactions to the VAT results of previous transactions.

When more than 2 parties are involved, the VAT treatment depends on the VAT treatment of the prior transactions.