Feedback tab has 3 choices:

Active - questionnaires you have received and have to fill out. If you haven't finished answering, there is a button named "Answer". After completing the questionnaire, you can edit it until it is closed for answering.

Received feedback - there you can see different feedback given to you (evaluations and appraisal interviews). You can also download it as PDF.
The different questionnaires are sorted in chronological order.

Given by me - 
questionnaires you have responded to.
You can see the list, but you can't see the details / your answers.

Feedback and Knowledge Base