CIS 2007 11.5.10

The best way I can ask for advice is to give an example scenario.

A Supplier is set up in the Extended Suppliers function for CIS.  The Supplier has the witholding tax option ticked in the standard Supplier function, but no witholding tax group chosen at that level. 

Witholding tax codes Gross, Net and unmatched are created.

So, when a witholding tax invoice get's entered onto Oracle, at distribution level, the witholding tax group is chosen and this makes the appropriate deductions.

However, an invoice ihas been entered onto Oracle against that particular supplier, but it isn't Gross, net or unmatched, so it is just entered as a standard invoice and