Unjust enrichment bars refund of excess sales tax once collected from customers and remitted to the Revenue.

Excess central sales tax collected from customers and remitted to the Revenue could not later be recast through revised invoices as a refundable amount. The Karnataka HC noted that the assessee had collected tax at higher rates than required, and that the excess collection was not in dispute. It held that once tax is recovered from the buyer in a completed sale and paid over to the Department, the dealer cannot restructure the sale price after the event to claim refund or adjustment. The refund claim was therefore treated as barred by unjust enrichment, and the authorities were justified in rejecting the revised return and related claim.

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Issues: Whether the assessee was entitled to claim refund or adjustment of excess central sales tax collected from customers and remitted to the Revenue, and whether the authorities were justified in rejecting the revised return and refund claim on the ground of unjust enrichment.

Analysis: The assessee had been required to collect central sales tax at 4% but the invoices showed collection at 10% and 10.5%. The excess collection from customers was not in dispute. The Court held that, once the assessee collected tax from the buyer and remitted it to the Department, it could not later seek to restructure the invoices by revising the sale price so as to convert the excess tax into a refundable amount. The principle applied was that tax collected from the customer in a sale transaction must be passed on to the Revenue, and the assessee cannot, after the event, recast the invoices to obtain refund of the excess collected amount. The authorities were therefore right in treating the claim as an afterthought intended to secure an unjust benefit.

Conclusion: The claim for refund or adjustment was rejected and the finding of unjust enrichment was upheld against the assessee.

Ratio Decidendi: Where a dealer collects tax from customers on a completed sale and remits it to the Revenue, it cannot later revise the transaction to claim refund of the excess on the basis of a restructured price, as such claim is barred by unjust enrichment.

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