Help has arrived, @KJOHNSTON0312. 

I'll help you ensure you can add those missing attachments back to QuickBooks Desktop.

An Attach folder is made and stored in the same location as the QuickBooks company file when utilizing QuickBooks Attached Documents. The connection between the company's file and the attached documents will be damaged by renaming the file or moving it to a new location.

To fix the problem, re-link the Attached Documents. Here's how. 

1. Browse to the location where your company file is stored and open the Attach folder.
2. If there is NO folder with the new company file name, change the name of the folder to match the new name of the company file.
3. If there is a folder with the new company file name, open the folder with the OLD company file name.
4. Copy and paste the contents of the Inbox folder into the Inbox sub-folder of the folder with the new company file name.
5. Copy and paste the contents of the Txn folder into the Txn sub-folder of the folder with the new company name.
6. From the QuickBooks Company menu, select Documents then Repair Attached Documents Links.
7. Click Repair Links.
    

You can check this reference to learn more about attachments: QuickBooks Document Center: FAQs and common issues.

To fix general problems when your company files in the future, visit this article: Can't open your company file in QuickBooks Desktop.

You can always reply or reach out to us again if you need anything else about managing your attachments in QBDT. We're always here to guide and assist whenever you need help. Have a good one.