How do in track mileage in the mobile app ?

It's my priority for you to track mileage in the mobile app, info1040.

We can turn on the Auto-tracking Mileage feature in your QuickBooks Online QBO) Mobile app. Then, make sure your phone has the correct location permissions enabled. 

Here's how:

1. Go to the Mileage menu.
2. Click the Auto-tracking option. 
3. Toggle Auto-tracking on.

For more details about this one, check out this article: Track mileage in QuickBooks Online.

If you need to track mileage for multiple vehicles, you can do it in QBO by accessing it through the web. You can refer to this article for the step and details: Manually track mileage for multiple vehicles in QuickBooks Online.

I've got a link here where you can find articles about managing your business in QBO: https://quickbooks.intuit.com/learn-support/help-articles/misc/03/help-articles-uk?label=QuickBooks%20Online.

Fill me in if you need a hand with running your financial reports or any QBO related. I'm glad to help. Keep safe and healthy.