Create a new document
Click on Documents - New.
You have to confirm the current invoice number with OK.
New customers can be created with a click on "New Customer".
The customer numbers will be given based on the number series, which you can change in Settings / Number Series.
You can manually change the delivery address and choose in the fx-menu, if it will be shown on the invoice. Usually, only the billing address is indicated on an invoice.
Write introductions and closing texts in the lower part of the document.
By entering costs and profit margin in "Calculation", the percental price can be calculated.
Use the "Journal" to see the total costs and the corresponding benefit for all invoice lines, in which costs have been lodged.