<p>If one wants to take the exam early to prepare for potential needs to retake it, what's the earliest one should do so?</p>
<p>Whenever you think you have given the full attention to prep and think you will get the score you are aiming for. Taking it sophomore year or something with a halfhearted effort can only hurt you and can’t help much, unless you’re scoring where you want on the practice tests.</p>