147 authorises the assessing officer to initiate proceedings under Section 147 if in the return filed, the assessee has understated the income or has claimed excessive loss, deduction, allowance or relief. It is expressly provided therein that the failure to make assessment based on return filed does not bar the assessing officer from initiating proceedings under Section 147 based on the materials furnished by the assessee in the return. The purpose of Section 147 is therefore not only to bring to tax income that has escaped assessment but to rope in income that would escape assessment if return is accepted and assessment made based on it. In other words, income escaping assessment can be made after assessment or without assessment. In this case the assessing officer while scrutinising the return filed by the assessee noticed that the assessee though paid huge amount of Rs. 63,94,000/- towards advance tax and Rs. 5,00,000/- towards self-assessed tax, has claimed complete exemption on the income on which advance tax was paid, and claimed massive refund. By virtue of clause (b) of Explanation 2 to Section 147, if the assessing officer in the course of scrutiny of the return finds that the assessee has under-stated the income or has claimed excessive loss, deduction, allowance or other relief, in the return the assessing officer is free to initiate income escaping