How to invoice a self paying patient?

To do this simply,

Select a patient and navigate to the Visits and Receipt Tab > Click on Add a schedule 

From here, click actions on the newly created schedule > apply payment 

You can indicate the owed amount under Patient Responsibility, if a client made a payment simply click on the green + sign to enter the paid amount

Once the amount is entered simply click on the date and time to highlight the entire transaction 

Click options > Print 

From here just select the type of invoice and click Print