So I think you might have done what I did after I finished my first GMAT prep test. After you finished the test, it probably showed you a window with the scores and as you went on it should you how many questions were correct/incorrect. The issue is if you closed that window, there is no way now to review those answers. GMAT Prep tests are styled that you finish the test, it'll show you the page where you can choose to review all, flagged or incorrect questions. If you close that page, you can't see where you went wrong anymore. I was completely surprised when that happened. However, you can review how much time to you per question style (average) and that's really the extent of it.

Sorry that it happened. That's my understanding of what can be seen and I've yet to be told there was a way to review the answers after you choose to close the test prep window.