1. First, issue a business license certificate at the local tax bureau where the company is located, and pay corporate income tax based on the contract amount.

2. For cross-province transactions, you can go to the tax authority in your current location with the settlement voucher and business license given in the contract and issue an invoice to collect payment.

Contract invoice, the receipt of payment given when the off-plan house is sold is called contract invoice. Usually occurs during pre-sales of homes.

Invoices refer to the business vouchers issued and collected by all units and individuals when purchasing and selling goods, providing or receiving services, and engaging in other business activities. They are the original basis for accounting and are also used by auditing and tax authorities. An important basis for law enforcement inspections.