Add a 'Fees charged'/transactions list
As in MTH, I can charge a fee anytime to a student, and it shows up on their invoice and transaction history. This is a great feature because I don't have to try to remember until the invoices are created at the end of the month. I can charge it as soon as it happens, and the invoice system pulls the info and includes on the total.
It helps me not forget money that is owed! I use this mostly for music purchased for students.
I think this would be a great addition to the current "add line item" feature.
Good News! We are planning this so you will be able to do this, in the coming months.