The quote and invoice modules work exactly the same way.
You only need to go to the module you want and click on "Add invoice" or "Add quote".
The editing page opens, and you can then fill in the information. Customer and billing address are the only mandatory information.
It is possible to personalize the body of the quote or invoice by adding:
Multiple product lines
Section title
Sub-totals
Comments
Discount and rebate
Demo video: To be updated
⚡ Note: You can only delete an invoice in draft status. So check your invoice before changing its status to " In progress ", " Paid " or " Unpaid ".