<p>Ok on the common app for IIT, there is a essay about IPRO which i finished. Then underneath that it allows you to upload a document for more information that you think IIT should know about you, is the second part mandatory? Should i write something or leave it blank?</p>
<p>That last part is not mandatory. If you have additional information that you would like the admission office to know about you, you can put it there.</p>