I can't. If you have a business license or no relevant qualification certificate, you can't start business and issue invoices, because you must have a business license and relevant qualifications to issue invoices. 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. It is the original basis of accounting, and it is also an important basis for law enforcement inspection by audit institutions and tax authorities.