go to Toefl.org to find the CBT test center near your place, they will provide the direct phone number with local access, don't try the 1-800 de, it's not good somehow.
you can see the infor in the title, for most times, it was like "Oct 11 . American JJ" something like that. I think the people posted JJ always put place they took ba. jia you. jia you.
actually about the JJ stuff, i didn't see it at all before i took the test, coz it is huge time-consuming and brain killer, i rather to focus on my study. so don't weigh JJ so much, just see the experience stuff, it really matter. Just practice more, recite more words. that's all need to do. JJ. it's nice though, your own hard-working is the most important thing.