(2)Where a return has been furnished under section 139, or in response to a notice under sub-section (1) of section 142, the Assessing Officer or the prescribed income-tax authority, as the case may be, if, considers it necessary or expedient to ensure that the assessee has not understated the income or has not computed excessive loss or has not under-paid the tax in any manner, shall serve on the assessee a notice requiring him, on a date to be specified therein, either to attend the office of the Assessing Officer or to produce, or cause to be produced before the Assessing Officer any evidence on which the assessee may rely in support of the return:Provided that no notice under this sub-section shall be served on the assessee after the expiry of [three] months from the end of the financial year in which the return is furnished.
