Hello! 1, there is no need to write off after the reform of foreign exchange write-off; 2. The customs declaration returned after you receive the customs declaration can be processed according to the tax refund process; 3. According to the Detailed Rules for the Implementation of the Guidelines for the Administration of Foreign Exchange in Goods Trade, an enterprise shall, within 30 days from the actual date of the import and export of goods or the receipt and payment of foreign exchange, submit the expected receipt and payment of foreign exchange or the date of import and export to the local foreign exchange bureau through the monitoring system: 130 days or more (excluding) the advance payment and advance receipt of foreign exchange for goods; Delayed payment for more than 290 days (excluding); Import trade financing such as forward letter of credit (including extension) and overseas payment for more than 390 days (excluding); 4B。 Class C enterprises receive advance payment, advance payment and deferred payment for more than 30 days (excluding) within the validity period of classified supervision; 5. Business in which the interval between receipt and payment of entrepot trade under the same contract exceeds 90 days (excluding) and the amount of foreign exchange received under one payment, one payment and the second payment exceeds the equivalent of 500,000 US dollars (excluding); 6. Other matters that should be reported; 4. Every foreign exchange business income and expenditure of an enterprise needs to be declared in the online balance of payments declaration system. After the exchange reform, the form of write-off is gone, and the previous single write-off is changed to the total write-off of enterprises. At the specific operational level, to cancel the system transmission of electronic port documents, enterprises need to complete the situation report mentioned in question 3.