Hello, @inghamva.
Yes, you can track Events trips in QuickBooks Online by adding a new Business purpose. You can follow these steps:
- On the Mileage page, click Add trip.
- Enter the trip date, start and end locations, and the distance.
- In the Business purpose dropdown, type the event name and click +Add to create it.
- Click Save.

Let us know if you have further questions, we'll be right here to help you anytime.