Withholding tax on items in Purchase order

Hi All,

We have a scenario like, i created the PO for the three item out of which one item is service type and i want to put the withholding tax of 5% on this item only, how i can achieve this scenario.

While searching on the internet i found that we can define the withholding tax at item level also by making the setup on “Item withholding tax group” but in my AX it is not available (Middle east installation ).

Please guide, thanks in advance