Bring your ID card to the self-service machine in the lobby of the tax authorities to invoice. Invoice refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities. When the company reimburses and issues invoices for personal skills training fees, it should ask the training unit for its billing information, and bring my ID card to the self-service machine in the lobby of the tax authorities to issue invoices.