Make sure that you are logged in to your admin control panel and then read on.
Hover over the Orders tab and then click on the Invoices subtab.
In the Invoice options panel shown in the preceding screenshot, select Yes to enable invoices for your customers.
In the Invoice number box, you can specify the number of the next invoice to be generated. This is a great cheat for hiding the fact that your shop is brand new. When your first ever customer gets the invoice number 5456753, they will have no idea how special they really are.
Look at the button labeled Generate PDF file by date.
Specify a date period, perhaps the beginning and the end of a particular month.
Click on the Generate PDF file by date button and you can easily print all of your customer invoices for that month.
We saw how to enable and disable customer invoices as well as print invoices for our own records.