I happened to encounter this problem yesterday, and I solved it after working on it for a while. I will share my steps. 1. Get the electronic invoice you obtained. Go to the National VAT Invoice Inspection Platform (National VAT Invoice Inspection Platform of the State Administration of Taxation), click on the relevant download, download the ofd file reader and install it; 2. Then enter the invoice information on the homepage of the VAT Invoice Inspection Platform and click Query. 3. After the inspection results come out, click "Download Format File" in the upper right corner. 4. Download "Download OFD Format File" and save it to your computer; 5. Open the VAT electronic invoice reader, open the file downloaded in the fourth step, and then click on the seal Just verify with the seller’s information.