Manually linking invoice to project

1. Go to Menu -> Sales -> Invoices and click Create New Invoice
2. Select customer.
3. A dropdown with projects will be shown below the customers select field (if no projects are associated with the selected customer the dropdown with projects won’t be shown)
4. Select the project
5. Configure the invoice for your needs
6. Save the invoice
7. Navigate to the project area and click on the tab Sales->Invoices you will be able to see the newly created invoice associated with your selected project.