If there is an old order, or the order has not been inputted into the system, you can upload the order in bulk via CSV, to make it easier not to input the orders one by one.
Using this method you can save more time when making many transactions.
You can follow steps in this article:
Step 1. Go to Order Menu - Import - Download Sample

*Note: After you click the download sample button so you can see the sample CSV file.
Step 2. Download Sample CSV file and adjust the contents

Index Properties
Column | Description |
Number | The number of invoice |
Outlet | The name of Outlet |
Date | Date of making |
Customer | Customer Email or Code |
TaxType | Tax name in your system |
Code | Code which is used to uniquely identify a variant |
Quantity | Quantity of product in your transaction |
UnitPrice | The price you want to sell to your customer |
Discount | A discount of the product |
Note | Additional note |
PaymentMethod | The way that a buyer chooses method payment |
PaymentAmount | The sum of payment |
Step 3. Upload CSV file, if it success, the picture will be like below

Step 4. If you want to see the result of import, click order

You might also like to read these articles below:
To configuration customer invoices, you can check this article Customer Invoice Printing Configuration
If you want to see update history customer invoice you can check this article How to see Update History Customer Invoice
If you want to make write off customer invoices, you can check this article Write off Customer Invoices
If you want to import & export order by JSON you can also check this article How to Import & Export Order by JSON