You need the full information on taxes paid on inputs to offset those on outputs… Any presumptive tax, or exemption, breaks the value chain and leads to cumulative taxation of business-to-business transactions… What Pakistan has is a reversion to excise-mode production taxation—this damages investment, exports and fails to raise revenues”— Professor Ehtisham Ahmad Few observations could better explain the predicament of Pakistan’s sales tax system than those of Professor Ehtisham Ahmad, one...