Hello Sosa1423,
Welcome to the Community.
While QuickBooks Online can only track mileage manually, QBSE has the capability to automatically do it. Please check this link to learn more: Automatic Mileage Tracking In The Mobile App.
There are also a lot of third-party applications for mileage tracking that integrates with QuickBooks Online. Let me route you to our Intuit Apps Center, and choose Expense Management in the Categories section.
Let's see what others can recommend for you business. Have a great day!