Having a blank VAT Product Posting Group on the Chart of Accounts should not cause an error it should simply be a case of the user having to enter a VAT Product Posting Group at the time of processing. At the moment if it is blank on Chart of Accounts and there is not the appropriate combination on VAT posting setup i.e. a blank VAT Product Posting Group it gets in a loop and you cannot process a transaction. Having a default on the Chart of Accounts is prone to user error in that they will forget to change the VAT Product Posting Group.

It would also be useful to have the VAT Product Posting Group as a default on the Vendor and Customer card as not all customers use stock and if the company is UK then for example all purchases from a US Vendor would be Zero.