Since I use INE I often visit their forum, which is called IEOC. This is the place to ask questions specific to your workbook. There are a lot of CCIE candidates and previous students who are now CCIE’s that are willing to help.
If you are using another vendor then you should use that forum to ask questions. Before asking questions make sure that your question has not already been posted by someone else. Browse through earlier posts or use the search function.
When labbing you will encounter some issues and the forum is the best place to get answers to this.