In AX 2012, there is a functionality for excluding tax for TDS calculation for General Journal.
This can be achieved by selection tax in General Jounal → Setup → Withholding Tax → Withholding Tax Groups & selecting the tax in the field “Exclude Ta for TDS or TCS calculation”.
When creating a General Journal for expense type, when we look at the calculation of the withholding tax, the selected tax is excluded from the calculation of amount origin for calculating withholding tax.
How can this functionality be achieved in AX 2009, as we cannot find any standard functionality for it.
There are too many uncertainties with your query, the foremost step I wold suggest is to get it checked if the desired functionality exists in the system, you ought to have a functional on your side to analyze.
It depends on the actual requirement and that is where analysts’ job comes into picture. Altering an existing functionality is always a challenging task and should not be judged on the basis of its feasibility.