1, "prepayment" invoice: in the invoice type column, select "prepayment" or "prepayment special invoice" and other prepayment-related invoice types.

2. Fill in the invoice content: fill in the invoicing items in the invoice name and unit price of goods or services, usually the unit price for the pre-negotiated or contractually agreed price, will not be changed because of the increase or decrease in the number of deliveries. At the same time, fill in the amount of prepayment amount in the amount column.

3, fill in the invoice header: in the invoice header column, fill in the name of the buyer and the taxpayer identification number and other relevant information.

4. Fill in other necessary information: Fill in the necessary information in the invoice date, invoicing person, payee and other relevant columns as needed.

5. Stamp and Signature: Stamp your company's official seal on the invoice and confirm it with the signature of the invoicing person.