Presumptive taxation for non resident activities fixes taxable profits on defined receipts and narrows audit relief.
Section 61 prescribes a presumptive taxation method for six specified non resident activities, fixing taxable profits as percentages of defined receipts (A and B) and supplying definitions and examples for those receipts; it bars deductions or losses against income so computed, prescribes written down value treatment, and permits audit based claims of lower actual profits only where expressly allowed and subject to strict bookkeeping and audit compliance, while the Act narrows those reliefs and clarifies definitional and non application provisions.