Good day, drfrankm.
Thanks for posting in the Community.
With QuickBooks Self- Employed, you can track your vehicle information and miles you drive for business through the web and mobile apps.
Through this, let's email or import your mileage using .CSV file format. To do this, please follow the outlined steps below:
1. Go to Gear icon.
2. Under Transactions, then click Imports tab.
3. Select the Import transactions tab.
4. Click Browse, then download your file using .CSV file format.
5. Once finish download, select Done.
Here's an article for more insights about the miles page and vehicle info settings in QuickBooks Self- Employed.
If you're using mobile apps, you can check this article for future reference about guide to fix the device if mileage tracker is stop working: Android mileage tracking troubleshooting guide.
Please know that you're always welcome to post if you have any other concerns. Community Team will always here to help.