Retrospective section 43B proviso and bona fide return error justified full waiver of advance surtax interest.

Interest under section 7C of the Companies (Profits) Surtax Act depended on whether advance surtax was short of assessed tax, with waiver governed by rule 13C. The underlying computation issue concerned unpaid sales tax under section 43B of the Income-tax Act, where the first proviso was treated as retrospective so that sales tax paid before the return due date could not be disallowed. On that basis, a revised return that had wrongly included the sales tax amount under a mistaken legal view did not create a real surtax shortfall, and the shortfall was not attributable to any default by the assessee. Full waiver of interest was therefore justified, with consequential refund relief.

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Issues: Whether interest levied under section 7C of the Companies (Profits) Surtax Act, 1964 was liable to be waived in full where the assessee's revised income included sales tax that, in law, could not be disallowed under section 43B of the Income-tax Act, 1961, and whether the assessee could be faulted for the shortfall in advance surtax.

Analysis: The liability to pay interest under section 7C arose only when advance surtax fell short of the assessed tax, and the power of waiver was governed by rule 13C of the Companies (Profits) Surtax Rules, 1964. The assessment dispute turned on the treatment of unpaid sales tax under section 43B of the Income-tax Act, 1961. The Court applied the Supreme Court's holding that the first proviso to section 43B is retrospective, so sales tax paid before the due date of filing the return could not be disallowed. On that footing, the assessee's revised return, which had voluntarily included the sales tax amount under a mistaken legal view, did not create a real tax liability for the purpose of computing the surtax shortfall. The shortfall was thus not attributable to any default of the assessee, and the mistake was treated as bona fide.

Conclusion: Full waiver of the interest was warranted, and the levy of the impugned interest could not survive.

Final Conclusion: The writ petition succeeded, the orders limiting waiver were quashed, and the entire interest demand was set aside with consequential refund relief.

Ratio Decidendi: Where the underlying income adjustment is impermissible in view of a retrospective proviso, no shortfall in assessed tax can be fastened on the assessee for the purpose of charging interest on advance tax or advance surtax, and bona fide mistaken inclusion of such amount cannot justify levy of interest.

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