Taobao sellers need a tax number to invoice. I don't know the tax number of my school. What should I do?

The school has a tax number, and the current tax number is the same as the social unified credit code on the business license, but it is not necessary to fill in the tax number when issuing ordinary VAT invoices to institutions. If the seller insists, he can find the school finance. By the way, from the perspective of tax system, it is best for sellers to fill in the tax number when issuing invoices, so you should also understand the sellers. Business is bad now, so don't complain easily.