I need to turn off/disable the mile tracking feature in the app. Please advise.

I can see the importance of turning off the mileage feature, Waldis.

As of now, this option isn't available in the QuickBooks Online mobile app. I'd recommend sending a feedback request directly to our Product Development team. Doing so helps us improve the features of the program. 

Before proceeding, access your account via the mobile browser. Here's how:

1. Go to the Gear menu and then select Feedback.
2. Type in your feature request in the description box.
3. Once done, click on Next.

You can track the feature requests through the Customer Feedback for QuickBooks Online website.

In case you'd like to download your mileage data for reference, I'd suggest following these steps: 

1. Go to Apps and select Mileage.
2. Select the drop-down arrow next to Add trip.
3. Click Download Trips.
4. QuickBooks downloads the trips as a CSV file.

Please keep us posted if you need additional help in managing your trips. We're always here to assist you.