Hello. My app is missing section now. Current Invoices that I haven’t yet sent are missing, my mileage section is missing. I don’t know what’s happened?

Welcome to the Community. We can perform some basic troubleshooting steps to get you back on track.

To begin with, make sure to log in to your QuickBooks as primary admin to ensure you can access any areas in the company.

Once done, we can clear the app's data to start fresh. The steps may vary by device.

Here's how:

Android:

1. Go to Menu ☰ then tap More Options ⋮.
2. Select Settings, then Refresh Data.
3. Tap Yes.

iOS:

1. Go to the Menu ☰ icon, then select Help & Feedback.
2. Tap Refresh Data.
3. Select Refresh.

You can also do it in your device settings:

Android:

1. Go to the Settings menu.
2. Select Apps (varies by device), then choose QuickBooks app from the list Storage.
3. Select Clear data.

iOS:

1. From your device's Settings, select Setting General iPhone Storage.
2. Choose an app that's taking up a lot of space.
3. Click the Offload App.

If the issue persists, I suggest you uninstall it and then reinstall the app:

1. Tap and hold the app on your phone.
2. Drag the app to the Uninstall section.
3. Select Yes to confirm.

Furthermore, here's an article that can help you personalize your invoice, sales receipt, or estimate template to match your unique style: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Additionally, I've added this article in case you need a reference on how to set up vehicles and mileage tracking: Set up vehicles and mileage tracking in QuickBooks Online with the mobile app.

Let me know if I can be of additional assistance to help you get the missing sections or any QuickBooks-related concerns. Keep safe.