The easiest way to comment on a question (or the answer) is to click Disagree on the ONtrack web page if you find on reviewing a completed session that you chose a wrong answer. Please then explain on the comment form what you think is wrong. Submitting this form from the ONtrack site itself tells us automatically which question it was and who you are (name and email).
You can use "Submit a request" to send us feedback from this PhP support site page. This alternative is more suitable for technical or subscription matters, or issues not connected with a particular question. If you do, however, use this means to send in comments on a specific question, please be sure to include the unique reference of the question copied from the right-hand panel of the ONtrack review page so that our reviewers can identify it correctly.