Buy a blank customs declaration form at the customs before export;

Give the relevant documents to the freight forwarder when exporting (they will tell you what you need);

Issue export invoices after export sales, and make tax-free declaration in the tax refund declaration system at the beginning of the next month;

The general freight forwarder will return the customs declaration verification form to you in the second month after customs declaration and export, which is generally called refund;

After receiving the refund, submit the documents at the electronic port and then go to the safe for verification;

Then declare the tax refund in the export tax refund declaration system;

The deadline is 90 days after the export date.