台帐合同核销１．企业台帐合同到期后 ,在向海关报送核销资料前 ,必须办妥本合同所有月份的集中报关手续 ,若合同有余料存在的 ,必须办理余料结转手续后方可向海关报送核销资料。２．企业报送到期合同核销 ,必须提供以下单证资料 :（１）加工贸易合同登记手册 ;（２）合同核销 Accounting contract write-off 1. After the expiration of the enterprise account contract expires, it must complete the procedures of centralized declaration for all months of this contract before submitting verification and verification materials to the customs. If there is more than one contract, it must submit the excess material transfer and submit it to the customs Write-off information. 2. Business submitted to the expiring contract write-off, must provide the following documents: (1) processing trade contract registration manual; (2) the contract cancellation