Adjusted total income definition excludes specified allowances, carried-forward losses and Chapter VIA deductions from computed total income. Adjusted total Income denotes the taxpayer's total income calculated under the Income-tax Act, excluding specified allowances, deductions and carried-forward losses. The exclusion covers allowances referred to in the provision, deductions relating to depreciation and specified deductions, losses carried forward under loss set-off provisions, and deductions under Chapter VI-A, thereby modifying the computed total income for the purposes of the relevant statutory rule.