<p>If I am taking my SAT in January, how do I add to the common app if I haven't decided as yet which subjects to take or simple don't want to send certain scores?</p>
<p>You can’t. You have to decide now as you send in the application whether you want to disclose the fact that you’ll be taking the subject test in January. </p>
<p>If you don’t know yet which subject you’ll be taking, you can leave a note about taking the SAT in the future in the additional information section.</p>