We appreciate you bringing this matter to our attention, @nmcdaniel.

We recognize the challenges you've encountered. Upon checking here, there's an open investigation (INV-93435) about importing files to QuickBooks Online.

I recommend contacting our QuickBooks Online Support Team to be added to the list of affected users. You will receive an email notification once the issue is resolved. Let me guide you on how:

1. Go to the Help (?) menu.
2. Select the Search tab, then click Contact Us.
3. Enter your issue and concern in the field.
4. Hit Continue.
5. Choose the Chat or Callback option.

For a step-by-step guide on importing Excel data to QBO, please refer to this article: Common questions about importing data to QuickBooks Online.

Please don't hesitate to reach out if you require any additional help. We're always here to assist you.