When the A.O. has accepted the revised return filed by the assessee under Section 153A, no occasion arises to refer to the previous return filed under Section 139 of the Act. For all purposes, including for the purpose of levying penalty under Section 271(1)(c) of the Act, the return that has to be looked at is the one filed under Section 153A. In fact, the second proviso to Section 153A(1) provides that “assessment or reassessment, if any, relating to any assessment year falling within the period of six assessment years referred to in this sub-section pending on the date of initiation of the search under Section 132 or making of requisition under Section 132A, as the case may be, shall abate.” What is clear from this is that Section 153A is in the nature of a second chance given to the assessee, which incidentally gives him an opportunity to make good omission, if any, in the original return. Once the A.O. accepts the revised return filed under Section 153A, the original return under Section 139 abates and becomes non-est. Now, it is trite to say that the “concealment” has to be seen with reference to the return that it is filed by the assessee. Thus, for the purpose of levying penalty under Section 271(1)(c), what has to be seen is whether there is any concealment in the return filed by the assessee under Section 153A, and not vis-a vis the original return under Section 139