Thank you for reaching out to us, jbstuch,
Tracking mileage in QBO is the ability to enter a vendor bill and making the employee who is to be reimbursed a vendor/supplier.
This option, however, is not available in QuickBooks Simple Start. If you need this feature, I recommend you upgrade to QBO Essentials.
You will need to enter a vendor bill until you pay/reimburse, a vendor/supplier, because there is no automated way to track mileage.
In doing so, make sure to set up an expense account for mileage, here’s how:
Then you’d have to set up a Product/Service for mileage. After doing so, you can start to enter and pay the bill.
That should do it. If you need more information about tracking mileage, please click the link below:
Stay in touch if you have any other concerns. Have a great day!