Allow me to help share information about the Mileage tracking feature.
Currently, the mileage tracking feature in QuickBooks Online (QBO) doesn't have the option to import mileage data. At the moment, we can only import these following information to QBO:
Customers
Vendors
Accounts
Products and Services
You can also check these links for more details about importing data in QBO:
This is on sales page for QBO in FAQ about mileage tracker feature. "As your business grows, QuickBooks Online may be the right option for you. The good news is you can automatically transfer your current mileage from QuickBooks Self-Employed to QuickBooks Online. After you sign in and switch plans you can select an option to bring your data over. You’ll find your miles waiting for you in your new account."
Where is this option exactly- in the app or online?
Having the ability to move Mileage automatically after upgrading a QBSE account to QBO is convenient when added to the program. You can only import the trips from Mile IQ to QBO.
At the moment, we can only import the following information to QBO:
Customers
Vendors
Accounts
Products and Services
You can also check these links for more details about importing data in QBO: