Configuring invoice settings
To setup your invoice preferences (such as what's included on the invoices, tax options, notes etc) you can do this in the Invoices/Receipts/Tax settings area.
From here you can create a new invoice, then optionally have it emailed to your client...
Once the invoice has been generated, you can then download, print or email it to your client:
You can view all your invoice history from a single view, including each invoice's payment status...
Assigning payments against invoices
It's one thing to send out an invoice to a client, but how do you best keep track of whether it has been paid or not? You can do exactly that by assigning payments against invoices. This is what the 'Status' badge tells you, it'll show you whether an invoice is Paid, Not Paid or Partially Paid.
To assign a payment, view the invoice then select the 'Assign a payment' button as shown in this example:
Next you can choose an existing payment already recorded (if exists), or record a new payment on the spot:
Once the payment has been applied, the invoice paid status will be updated to reflect that the invoice has been paid: