The document discusses the valuation of supplies under section 15 of the CGST/SGST Act. It states that as per section 15(1), the value of a supply shall be the transaction value which is the price actually paid or payable where the supplier and recipient are not related. The value shall also include any amount the supplier is liable to pay that was incurred by the recipient, incidental expenses charged by the supplier, interest/late fees/penalties for delayed payment, and subsidies directly linked to the price excluding central/state government subsidies. Discounts given before or at supply are excluded from transaction value but those given after supply are included. Where transaction value cannot be determined, valuation shall be as prescribed. Valuation rules