Section 166 — Conditions for treating a return as defective return under section 263(7)

(1) A return of income shall be regarded as defective, if any of the following conditions is satisfied: —
(a) all fields, parts, schedules, statements, and columns in the return of income, as applicable to the case of the assessee, have not been duly filled in,including those relating to computation of income chargeable under applicable heads of income, computation of gross total income and total income;or(b) the report of the audit, in auditable cases, referred to in section 63, has not been furnished prior to the filing of the return of income; or
(c) if the return of income is furnished under section 263(6), the details of payment of tax as per section 267 are not duly filled in the return; or
(d) the brought forward credit of minimum alternate tax (MAT) or alternate minimum tax (AMT) claimed in the return is not in accordance with the carryforward of MAT or AMT in the latest return, as the case may be, allowed to the assessee.(2) The Board may notify, the class or classes of persons, to which any of the conditions specified in clauses (a) to (d) of sub-rule (1), shall not apply or shallapply with such modifications, as may be specified in such notification.