Hedging refers to futures trading for the purpose of avoiding spot price risk. It hedges the profit in the futures market and the loss in the spot market by buying hedging or selling hedging. An enterprise completes a transaction by selling or buying a previously held buy or sell contract, and the liquidation gains and losses increase or decrease the "futures margin". Realized liquidation gains and losses shall be recorded in the "futures gains and losses" account. Guo Shui Fa [2002] No.45 document stipulates: "When a general VAT taxpayer purchases goods through futures trading on a commodity exchange, the money transferred through the commodity exchange can be regarded as payment to the sales unit, and the legal special VAT invoice obtained by him can be deducted." Therefore, when the cost of hedging business increases due to the loss of liquidation, the input tax cannot be increased, and the legal special VAT invoice should be used to offset the input tax.