Teamleader Focus offers you a basic example template, which can be modified and updated under Settings > Custom layout. This way, you'll have the opportunity to use your own house style.
If you need multiple types of invoices, be sure to read this article. Equally interesting may be the fact that you can add your very own general terms and conditions.
Note: The templates for credit notes match the ones for invoices. Click here to learn how you can create a credit note.
That's it: you're all set to create your invoices! Click here for an overview of all articles on how to get started with Teamleader Focus.