Surtax as tax on excess or abnormal profits allows deduction in companies' profit computation for affected financial years. Notification that the surtax levied under Section 4 of the Companies (Profits) Surtax Act, 1964 is to be treated as a tax on excess or abnormal profits for the purpose of computing company profits, thereby permitting deduction of that surtax in determining taxable company profits, effective for financial years ending on or after publication in the Gazette of India.