I moved your thread to the "About This Board" forum. The "Test Here" forum is really just for you to test your posting techniques, so you really don't want to post anything in there that you are looking for a reply from.
You typically have about 5-10 minutes to edit your own posts. After that, the post is locked. If it is something that requires an edit (i.e. contains personal data which should be not be posted on the public forums), you can use the "Report" button under each thread to report it to a Moderator. Otherwise, if you just need to clarify something, you can simply post back to your original thread.