You must declare your income within the year and settle the annual export income data at the end of each year. The data you declare must be consistent with the data you send to the tax through the electronic port, no matter how much, otherwise it will be treated as domestic sales. If the foreign exchange payment is not received, an incomplete declaration will be made, and the export tax rebate will be applied after the payment is recovered. If more than 180 is undeclared or incomplete, it will also be sold domestically.