<p>What is it exactly you want to update? Schools have application deadlines for a reason.</p>
<p>Most schools require a mid-year grade report as well as final grades, so that process is in place. They will also tell you which SAT/ACT test dates they will consider. If December is the last test they’ll take, then there’s no point in sending them January scores. </p>
<p>The time to “update” your application would be before the application deadline passes, or after the decision–if you are waitlisted or want to appeal a denial. That’s when they ask for and are looking for your updates.</p>