journal generator and VAT

hello,

we are using a custom table based on in order to load GL transaction into PeopleSoft Finance.

previously we use flat file import which calculate VAT on transactions using defined expense account.

How can we have the same behavior using Journal generator will all system source usable are excluded in Journal Edit (

H.SYSTEM_SOURCE NOT IN

('ALO','CLO','CON','EQT','REV','SCV','TRN','TWL') AND H.SYSTEM_SOURCE NOT

LIKE 'G%')