How to Integrate FCC Supplemental Data to an Inbox Received File

Hello, we are trying to design an integration to populate lines of a Supplemental Data Form using an Inbox folder file. This file is designed by a third party and put into our FCC Inbox folder.

The issue we are facing is that when we follow this flowchart to update supplemental the data It shows only Local Files and not Inbox files.

• Tasks > Supplemental Tasks > "Designed Form Template" > Import > Choose File

So our questions are the following:

• Is there a way to import data into a Supplemental Data Form from an Inbox located file?
• If so, if I update the file but keep it's name as is, does it change the updated values?