Reassessment and best judgment assessment both fail where full disclosure exists and estimates rest on suspicion, not evidence.

Reassessment under section 34(1)(a) was invalid because the primary facts concerning the bank draft and related credits had already been disclosed, so there was no omission or failure to disclose fully and truly all material facts, and the notice founded on that basis could not stand. The best judgment estimate of undisclosed investment and notional profits was also unsustainable because the record contained no material evidence of secret investment or of profits accruing in the relevant year; an assessment cannot rest on suspicion or conjecture. The reference was answered in favour of the assessee on both substantive issues.

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Issues: (i) Whether the reassessment notice under section 34(1)(a) of the Income-tax Act was valid when the primary facts relating to the bank draft and the credits in the family books had been disclosed; (ii) Whether there was material on record to justify the finding that Rs. 1,18,000 had been secretly invested in business and that profits of Rs. 60,000 could be estimated and taxed for the assessment year.

Issue (i): Whether the reassessment notice under section 34(1)(a) of the Income-tax Act was valid when the primary facts relating to the bank draft and the credits in the family books had been disclosed.

Analysis: The condition precedent for action under section 34(1)(a) is the Income-tax Officer's reason to believe that income escaped assessment because of omission or failure to disclose fully and truly all material facts. The account books before the assessing authority already disclosed the relevant credits and the movement of the amount from Jaipur to Dibrugarh. The material facts necessary for assessment were therefore available at the original stage, and there was no basis to infer that the alleged non-disclosure caused under-assessment.

Conclusion: The reassessment notice was not justified, and the proceedings founded on it were invalid in law, in favour of the assessee.

Issue (ii): Whether there was material on record to justify the finding that Rs. 1,18,000 had been secretly invested in business and that profits of Rs. 60,000 could be estimated and taxed for the assessment year.

Analysis: A best judgment assessment may involve estimation, but it cannot rest on mere suspicion, conjecture, or caprice. The record did not contain evidence that the amount had been secretly invested or that it yielded profits of Rs. 60,000 during the relevant accounting year. The estimate was based on assumptions rather than material evidence, and profit from any earlier investment could not be brought to tax for the year in question without proof that it accrued in that year.

Conclusion: There was no material to sustain the estimate of Rs. 60,000, and the finding was unsustainable, in favour of the assessee.

Final Conclusion: The reference succeeded on both substantive questions, while the separate writ petition was rejected as unnecessary in view of the answer given in the reference.

Ratio Decidendi: Reassessment under section 34(1)(a) requires material showing failure to disclose fully and truly all material facts and a rational basis for belief that income escaped assessment, and an estimate in best judgment assessment must rest on evidence, not on suspicion or conjecture.

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