In general invoices for a flat fee Matter will come from a blank invoice with a service for the flat fee. However, if you add soft and hard cost expenses to the invoice you will first need to create the invoice from unbilled activities, then add the service line items for the flat fee:
- Navigate to the Accounting section and select an invoice to open under the Invoices & Payments tab.
- Click + in the action bar of the Line Items to add a new line item for the Flat Fee as a Service.