According to the Jeopardy Tickets web site there are only four taping dates in this season. There are only two that are in April, with two sessions (5 shows each) for which there would be adequate time to get booked. I’m guessing they need about 12 contestants per day (20 for the 10 shows, a few for alternates), so that is a total of 45 left. But again, this is only an educated guess at best. In about two weeks, if I’ve not heard anything, it will be time to start planning on taking next year’s online test.