The net payorder includes the WHT so YES you pay that before delivery (at the time of balance payment if booked on partial payment). If booked on full payment then the sales guy should have told you to get the PO which includes WHT. How come they missed out WHT?
I don't understand why they are asking for a separate PO for WHT.
Toyota Indus pays the WHT on your behalf amd you include that amount in the net payment PO.
SO basically the PO includes, cars ex factory price plus freight plus WHT (which varies according to filer status).