My mileage has disappeared from my app. No mileage or track trip / savings showing ?

I can help you with locating these missing mileage trips, sdmilneservices. 

First, make sure to use the latest version. Once done, log in to your account and check if you can now see your mileage logs. If the error persists or you already have the latest app, clear your app cache. 

The piled-up cache in your application caused this odd behavior. Clear your data or cache for this app in the Storage section of your mobile phone to reset the app to its default state.

Here's how to clear app cache or data storage if you're using an Android:

1. Open your phone's Settings app.
2. Tap Apps & notifications and click on See all apps in the app Storage.
3. Select Clear storage or Clear cache. If you don't see Clear storage, tap Clear data.

For IOS:

1. Open your Settings swipe down and tap the QuickBooks Online app.
2. Swipe down again and select Clear History and Website Data, and click it once again to confirm.

See this article for detailed guidance about setting up vehicles and mileage tracking. It also explains managing vehicles, tracking business miles, and adding and editing favorite locations: Set up vehicles and mileage tracking in QuickBooks Online with the mobile app.

In case you're having trouble tracking your trips from your mobile app, follow the steps outlined in the following article on how to resolve it: Fix mileage tracking issues in the QuickBooks Online mobile app. 

Let me know if you need further help with your mileage trips. I'm always here to answer them for you. Keep safe, and have a wonderful day!