Can I add mileage manually?

Welcome to the Community with your mileage concern, @ben-c-mail-com. Yes, you can manually add mileage in QuickBooks Online, and I'll show you how to do it:

1. In your QuickBooks Online on a web browser, go to Apps.
2. Select Mileage, then select Add trip.
3. Enter the trip date, starting and ending locations, distance, and the purpose.
4. Pick the vehicle you used.
5. Click Save.

For future reference, you can check out this article to learn more about setting up automatic mileage, adding vehicles, and fixing mileage tracking issues: Record your business miles and vehicle expenses in QuickBooks.

Feel free to visit again if you need anything else about managing your mileage. I’d be right there to help you again.