How do I categorise my client’s sales invoices?

To categorise a client’s sales invoice:

Click the ‘Bookkeeping’ tab in the client navigation, and select ‘Sales invoices’ from the dropdown menu
You can filter the invoice listing to see only unpaid, late or paid invoices
Click on an invoice in the listing to view the details
On the invoice details screen, use the ‘Category’ dropdown menu to set a new category