Deemed profits for retail business: default turnover-based income computation with audit-backed option to report lower profits. Deemed profits for retail business are set as a percentage of total turnover and treated as taxable business income, with standard expenses and depreciation treated as already allowed; firms may deduct partner salary and interest within prescribed limits. Assets' written down value is computed as if depreciation were claimed. Accounting and audit provisions are excluded for this business when computing monetary thresholds, but an assessee may claim lower profits if required books are maintained and statutory audit and reporting are complied with.