(i)if it is of the opinion that any further inquiry in the matter is necessary, direct the [Principal Commissioner or Commissioner] [Substituted by Act 25 of 2014, section 4, for 'Commissioner' (w.e.f. 1-6-2013).] to make such inquiry or cause the inquiry to be made by any other income-tax authority and furnish a report containing the result of such inquiry to it; or