Works contract taxation requires a workable turnover method; invalid source deduction and refund with interest follow.

The definition of "dealer" under the Tripura Sales Tax Act was upheld as intra vires because a works contractor could be brought within the taxing scheme through the charging and deeming provisions. Tax on transfer of property in goods involved in works contracts, however, could not be assessed or recovered where the Act supplied no workable method for computing taxable turnover and purported to extend beyond the State's legislative competence. The flat-rate tax-deduction-at-source scheme was also struck down as it applied to gross bills without excluding non-taxable components or out-of-scope transactions. Amounts deducted under the invalid provisions were refundable with interest.

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Issues: (i) Whether the definition of "dealer" in section 2(b) of the Tripura Sales Tax Act, 1976 was unconstitutional; (ii) whether tax under section 3A on transfer of property in goods involved in execution of works contract could be assessed and recovered; (iii) whether section 3AA of the Act and rule 3A(1) of the Rules providing for deduction of tax at source were constitutionally valid; and (iv) whether the petitioner was entitled to refund of the amount deducted at source.

Issue (i): Whether the definition of "dealer" in section 2(b) of the Tripura Sales Tax Act, 1976 was unconstitutional.

Analysis: The definition of "dealer" had to be read with the charging and deeming provisions of the Act. A person executing a works contract could validly be brought within the class of dealers because section 3A treated transfer of property in goods involved in such execution as a sale. The constitutional challenge could not succeed merely because a person might not be liable on a particular transaction.

Conclusion: The definition of "dealer" in section 2(b) was held to be intra vires and not unconstitutional.

Issue (ii): Whether tax under section 3A on transfer of property in goods involved in execution of works contract could be assessed and recovered.

Analysis: The court accepted that the 46th Amendment permitted taxation of the value of goods involved in a works contract as a deemed sale, but held that section 3A failed to provide any workable method for determining turnover in respect of works contracts. In the absence of a provision prescribing the manner of computation of taxable turnover for such transactions, the levy could not be effectively assessed or recovered. The court also held that the State could not extend the levy to inter-State sales, outside sales, or sales in the course of import or export.

Conclusion: Tax under section 3A could not be assessed and recovered in the absence of a valid computation mechanism, and the provision was unconstitutional to the extent it transgressed legislative limits.

Issue (iii): Whether section 3AA of the Act and rule 3A(1) of the Rules providing for deduction of tax at source were constitutionally valid.

Analysis: The deduction-at-source scheme required deduction at a flat percentage from the gross bill without excluding non-taxable components such as labour and service charges or transactions outside the State and beyond the State's taxing competence. Since a source deduction provision is only a mode of collection, it cannot operate where the underlying levy cannot validly extend to those components. The flat-rate deduction mechanism was therefore excessive and legally unsustainable.

Conclusion: Section 3AA and rule 3A(1) were held to be bad in law and ultra vires.

Issue (iv): Whether the petitioner was entitled to refund of the amount deducted at source.

Analysis: Since the source deductions were made under invalid provisions and the amounts had been collected without lawful authority to that extent, the petitioner was entitled to restitution of the sums deducted. Interest was also directed to compensate for the wrongful retention of the money.

Conclusion: The petitioner was held entitled to refund of the deducted amounts with interest.

Final Conclusion: The writ petition succeeded in part. The court upheld the dealer definition, but struck down the source-deduction scheme and held that tax could not be assessed and recovered on works contracts in the absence of a valid turnover-computation mechanism, resulting in a direction for refund with interest.

Ratio Decidendi: A deemed sale levy on works contracts is valid only if the statute supplies a constitutionally permissible and workable mechanism for identifying and computing the taxable turnover, and a source-deduction provision cannot compel collection from non-taxable components or transactions beyond the State's legislative competence.

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