To change to the correct File Submission on the Checklist you would need to process the File Submission as it currently was submitted, to do this navigate to:

1. onBoard
2. Process
3. File Submissions
4. Process

Then you will be able to manually edit the File by navigating to:

1. onBoard
2. People Finder
3. Search the User
4. Click the Checklist Tab
5. Click Edit next to the Checklist Step you need to attach the correct File to. Click the X to delete the incorrect file and then attach the correct file