Prima facie adjustment cannot rely on external material, and additional tax is not leviable where the adjusted return still shows a loss.

Prima facie adjustment under section 143(1)(a) cannot be based on material outside the return, including past records or material gathered during regular assessment proceedings, and rectification under section 154 is not justified on that basis. Where the assessee's returned loss remains a loss even after the adjustment, additional tax is not leviable. The disputed adjustment and related additional tax were therefore unsustainable, with the result favouring the assessee.

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Issues: Whether additional tax levied by rectifying the intimation under section 143(1)(a) could be sustained when the adjustment was based on past records and material gathered in regular assessment proceedings, and whether additional tax could be charged where the return still disclosed a loss after the adjustment.

Analysis: The adjustment made by the Assessing Officer was not founded on the material available in the return itself but on an error discovered from past records examined during regular assessment proceedings. Such use of external material was held to be outside the scope of prima facie adjustment contemplated by section 143(1)(a). The reliance placed on rectification under section 154 was also found unjustified in these circumstances. The decision further accepted the settled position reflected in the cited circular and authorities that where the assessee's returned loss remains a loss even after the adjustment, additional tax is not attracted.

Conclusion: The additional tax and the rectification-based prima facie adjustment were not sustainable and the finding was in favour of the assessee.

Final Conclusion: The appeal failed because the disputed adjustment was held to be beyond the permissible scope of summary processing and could not support levy of additional tax.

Ratio Decidendi: A prima facie adjustment under section 143(1)(a) cannot be based on material outside the return, including past records or material unearthed in regular assessment proceedings, and additional tax is not leviable where the adjusted return still results in a loss.

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