Related Dynamics NAVISION in Australian localisation

Problem is related with “With holding Tax”( WHT)

when I make the Payment to vendor with Attached WHT through payment Journal, in this case WHT related General ledger entries generated.

but I want these WHT related entries to be generated at the time of invoice posting.

So my Question is whether it is possible or not?

If possible, then Please Help me Out with Solution.

Not out of the box at least. Withholding tax is tax, you as a company must deduct from you payments, at the time of the payment as being a part of the vat from the vendor invoice. So you don’t know the actual WHT before you do the payment, as it neither know the date of payment or which amount you pay.
So naturally that’s also the way NAV works [:)]