Tax credit and double-taxed turnover in works contract assessment required documentary proof; labour deduction challenge failed.

Tax deducted at source had to be credited on production of the prescribed certificates, because the Rules could not override the substantive entitlement under the Act. Turnover relating to goods already taxed under the Central Sales Tax Act or the State sales tax law was also liable to reconsideration for exclusion from works contract turnover, subject to proof by valid documents. The claim for larger deduction towards labour and other charges was rejected, as the concurrent findings found it excessive and unsupported. The assessment was not invalidated for alleged non-adherence to rule 14(1)(b), since that ground was raised for the first time in the writ petition.

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Issues: (i) Whether the assessee was entitled to adjustment of tax deducted at source on production of tax deduction certificates; (ii) whether the turnover relating to goods already taxed under the Central Sales Tax Act, 1956 or the Assam General Sales Tax Act, 1993 was liable to be excluded in computing taxable turnover of works contracts; (iii) whether the assessee's claim for larger deduction towards labour and other charges was liable to be reopened; and (iv) whether the assessment could be invalidated for alleged non-adherence to rule 14(1)(b) of the Rules.

Issue (i): Whether the assessee was entitled to adjustment of tax deducted at source on production of tax deduction certificates.

Analysis: Section 27(4) of the Act of 1993 requires adjustment of tax already deducted at source during assessment on production of the prescribed certificate. The requirement in the Rules relating to transmission of challans to the assessing authority is procedural and cannot override the substantive entitlement under the Act. The State also accepted that appropriate adjustment would be made on receipt of the relevant materials.

Conclusion: The assessee is entitled to credit for tax deducted at source on the basis of the tax deduction certificates produced or already filed.

Issue (ii): Whether the turnover relating to goods already taxed under the Central Sales Tax Act, 1956 or the Assam General Sales Tax Act, 1993 was liable to be excluded in computing taxable turnover of works contracts.

Analysis: Sections 7(4) and 8(3) of the Act of 1993 must be read together. Goods brought into the State in the course of inter-State sales cannot be subjected again to State taxation, and goods already taxed within the State are also not liable to double taxation when used in execution of works contracts, subject to proof by valid documents. The authorities below rejected the claim on an erroneous understanding that section 8(3)(iv) excluded such relief.

Conclusion: The assessee is entitled to reconsideration of its claim for exclusion of such turnover, if substantiated by the record.

Issue (iii): Whether the assessee's claim for larger deduction towards labour and other charges was liable to be reopened.

Analysis: The primary and revisional authorities found the claim excessive and unsupported by valid documents, and allowed only the deduction permissible under Schedule VI by applying rule 14(1)(b). No sufficient ground was shown to disturb those concurrent findings.

Conclusion: The assessee's claim for further deduction towards labour and other charges was rejected.

Issue (iv): Whether the assessment could be invalidated for alleged non-adherence to rule 14(1)(b) of the Rules.

Analysis: The challenge to the validity of the assessment on this ground was raised for the first time in the writ petition and had not been urged before the assessing or revisional authorities. The Court declined to permit reopening of the assessment on this new basis.

Conclusion: The assessment was not invalidated on this ground.

Final Conclusion: Relief was granted only to the extent of reconsideration of tax credit and exclusion of turnover relating to goods already taxed, while the remaining challenges to the assessment were left undisturbed.

Ratio Decidendi: A substantive statutory entitlement to tax credit or exclusion of already taxed turnover in works contract assessment cannot be denied by a procedural requirement, provided the claim is supported by the prescribed or otherwise reliable documentary evidence.

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