Once your assessment is `Under Review`, you'll be prevented from making changes directly to your answers, and you will see a grey titlebar indicating that. From this point on in the verification process, you will need to make a request for changes to be made to your assessment. To request an answer to be changed, navigate to the `Question Filter` using the navigation panel on the left.

Click the `Filter` button on the right, then expand `Display`, and click `Show Activity`. 

Questions will now have an section to add comments.  When you add a comment requesting that your answer is changed, next time B Lab staff looks at your assessment, they'll see the comment, and can update your answer for you.