My app is telling me I have 3 overdue invoices. I have one unpaid & none past due. When I click to see my overdue invoices, there aren't any. It's driving me nuts!

Hello there, jessica. I understand that you are facing an issue with your QuickBooks app. I'm here to help you resolve it.  

To begin with, kindly ensure that you have a strong internet connection and an updated version of the app to sync the latest data. If your app is not updated to the latest version, kindly update it. 

If the issue persists even after performing the above troubleshooting steps, I suggest clearing the application data to ensure your QuickBooks Online (QBO) app works properly. 

For iOS users:

1. Go to your phone's settings.
2. Select General, then choose iPhone Storage.
3. Tap QuickBooks Online from the application list.
4. Select Offload App to free up the storage without deleting the documents and data for the app.

For Android users:

1. Go to your phone's settings,
2. Choose Apps (varies by device).
3. Select QuickBooks Online from the application list.
4. Go to the Storage section, then tap Clear Data.

If the issue still persists, I recommend uninstalling and then reinstalling the app. 

For your convenience, I'm adding a helpful article that can assist you in solving common errors in the QuickBooks Online mobile app for Android: Fix common errors in the QuickBooks Online mobile app for Android

Moreover, for personalizing your sales forms, you can refer to this article: Customize invoices, estimates, and sales receipts in QuickBooks Online

If you have any further concerns or follow-up questions about invoice in your QuickBooks app, feel free to come back to this post. I'll be here to lend a helping hand.