Vat doc required for VAT setup at bu level

 Hi!

i urgently need a document for understanding VAT that is setup at business unit level.

basically i have a querry on how the vat is defaulted for any business unit.

for creation of invoice the user uploads a file in which there is no vat defined .

then he follows these steps..

1.he runs a SQR SYBIINTF for insertion of date in PS_INTFC_BI ...  here i have checked that the TAX_CD_VAT does not gets populated.

2.he runs a job which consist of a SQR & APP ENG

BIIF0001 -- App eng

BIPVAT00 -- SQR

Arastu