Use when document being attached supports what you are currently filing. 

NEVER attach a document that can be filed under Notices & Hearings.

From the Browser screen:

1. Click Yes at Attachments to Documents.

In the second Browser screen:

2. Browse, verify and attach additional supportive document (PDF file).
3. Select Type of document such as Declaration, Exhibit, etc. or type description  of document.
4. Click Add to List.
5. Repeat steps 2 - 4 until all supportive documents are attached. When done, click on Next to continue procedure.