Fair notice and rational computation are required before joint Hindu family assessment and income estimation can be sustained.

An assessee cannot be assessed jointly on a joint Hindu family basis without prior notice of that basis and a fair opportunity to meet it; where separate assessments were originally proposed, a later joint assessment made without such notice was invalid. An income assessment must also rest on a discernible and rational computation, not on an arbitrary estimate; where the order disclosed no intelligible method for fixing income, the assessment of Rs. 45,000 could not be sustained. The reference thus succeeded on both procedural fairness and lawful computation grounds.

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Issues: (i) Whether the assessees could be assessed jointly as members of a joint Hindu family without being informed of that basis and given an opportunity to meet it; (ii) Whether the assessment of income at Rs. 45,000 was valid when no intelligible basis or method of computation was disclosed.

Issue (i): Whether the assessees could be assessed jointly as members of a joint Hindu family without being informed of that basis and given an opportunity to meet it.

Analysis: The notices issued under Section 22(2) of the Income-tax Act, 1922 were for separate assessments, and no issue had been raised before the Income-tax Officer that the assessees were jointly liable as members of one Hindu family. The assessees were not told that joint assessment was proposed and were therefore deprived of the opportunity to adduce evidence in support of separation. The refusal to permit production of material before the appellate authority, when no chance had been given earlier, reinforced the procedural unfairness. The procedure adopted was contrary to the requirements of Sections 22 and 23 of the Income-tax Act, 1922.

Conclusion: The joint assessment, made without notice and without giving an opportunity to contest the basis of joint liability, was invalid and the finding was in favour of the assessees.

Issue (ii): Whether the assessment of income at Rs. 45,000 was valid when no intelligible basis or method of computation was disclosed.

Analysis: Although the Income-tax Officer could make an assessment under Section 23(3) of the Income-tax Act, 1922 where the return appeared incomplete or incorrect, he was still required to proceed on some discernible basis and not act arbitrarily. The order disclosed no method or foundation for arriving at the figure of Rs. 45,000. Section 13 of the Income-tax Act, 1922 did not authorise a wholly arbitrary estimate without evidence or method. Since no basis of computation was shown, the assessment could not be sustained as a lawful assessment under the Act.

Conclusion: The assessment of Rs. 45,000 was illegal and the finding was in favour of the assessees.

Final Conclusion: The reference succeeded because the assessees were assessed without fair notice on an unproved joint-family basis and the income was fixed without lawful computation.

Ratio Decidendi: An assessee cannot be assessed on a new basis of liability without notice and opportunity to meet it, and an income assessment under the Act must rest on some rational evidentiary basis rather than an arbitrary estimate.

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