Hi everyone. I'm kicking myself for not signing up for this program sooner because I fly a lot. Two questions:

1. The friend who referred me told me I can add flights that have taken place during the last three months to my account. Is this true? If so, where do I do this?
2. I have an existing flight on Turkish that I booked a few weeks ago through Chase that I'm taking in two weeks. How can I add that one?

Thank you for your help; sorry if these seem like silly questions!