Hi, melinda35. QuickBooks currently doesn't provide a dedicated mileage report, but you can see mileage details in the Mileage window.
When you record charitable mileage as business, it will show up in your reports and potential deductions will be visible. If you record it as personal, it won't be included in reports or show any deductions. If necessary, you can download the details of your trips for use outside of QuickBooks.

If you want to learn more about how to record business miles for one or more vehicles, you can check this article: Automatically track mileage in QuickBooks Online.
Additionally, we have here article to learn how to Customize reports in QuickBooks Online: Customize reports in QuickBooks Online.
Lastly, for improved efficiency in your accounting practices and to maintain flawless financial records, I strongly suggest looking into QuickBooks Live Bookkeeping. This service offers personalized support designed to handle the complexity of your financial data efficiently. By outsourcing these important tasks, you can free up precious time to concentrate on strategic aspects that contribute to your business's growth and success.
Your dedication to run report for mileage is truly appreciated. If any questions arise or if there's anything else you'd like to discuss, please leave a comment below. I'm here and ready to assist you at any time, ensuring you have the necessary support to progress smoothly.