Try to see the Feedback Report as an expansion and reinforcement of the feedback offered in the lesson. With this in mind, you should aim to avoid copying and pasting more than 50% of either your Overall Feedback or In-Depth Feedback from the Ringle Doc.
Perhaps one of the best ways to think about the Feedback Report is a place to put in writing all of the explanations and advice you gave verbally during the lesson. If, for example, you spent a while explaining a certain grammatical feature in a lot of detail, write down that explanation in this Feedback Report so that your student can easily refer back to it at a future date. Similarly, if you suggested an exercise at the end of the lesson, use the Feedback Report to describe and explain this exercise and its importance to the student.