Section 123D: Power of Commissioner regarding assessment

-The Commissioner may, at any time—-

(a) make, suo motu, an assessment in any case where a return on the basis of self-assessment has not been filed;

[Provided that no such assessment for an assessment year shall be made after the lapse of seven years from the close of that assessment year.]

[(b) revise any assessment where the information furnished in the return of self-assessment is found to be incorrect or reopen any assessment where it has been detected that there is wilful suppression of information; and]

[(c)] impose a penalty not exceeding thirty per cent of the difference in tax arising from non-filing of a return in time, giving wrong information or wilful suppression of facts.]