There are 2 Methods:

First Method:

Step 1: Login to the CRM, and Click the Deals Icon to open your Deal Dashboard

Step 2: Locate the Deal that you would like to submit additional Documents for

Step 3: Click on the "Add/View Documents Button" on the Right Side of the Specific Deal

Step 4: A "Deals Documents" Pop Up Opens Up, it contains a section to Upload New Documents and Download the Already Submitted Documents

Step 5: Once you have uploaded the new Documents, Click "Submit New Documents"

Step 6: In 30 Seconds you will receive an email confirming that your Documents Have been Uploaded

Second Method: