2. declare and pay taxes and fees in the same window.
3. Receive invoices in the same window.
4. Invoices refer to business vouchers issued and collected by all units and individuals in buying and selling commodities, 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. Receipt is the proof of receipt and payment, and invoice can only prove that the business has happened, but can't prove whether the money has been received or paid.