Thank you for visiting the QuickBooks Community, GAJ. I'm here to explain the mileage feature of QuickBooks Online (QBO).
When managing your trips on the Mileage page, you can notice that the Apply button appears grayed out or inactive when selecting multiple trips. This happens when you haven't entered the purpose of the trips. To proceed, make sure to provide the purpose of the selected trips before trying to apply any changes.
Here's how:
On your Expenses page, go to Mileage.
Select Unreviewed, Business, Personal, or All.
Choose the trips you want to organize, then click the Edit Purpose tab.
A prompt will appear, then enter the purpose of the trips.
Thanks for going back to this thread, GAJ. Let's clarify things more about mileage features in QuickBooks Online (QBO).
TheEdit Purposetab is unavailable since you've mentioned that your records are selected asPersonalfrom theTrip Details. What you can do is use theApplybutton if you want to move your selected trips to theBusinesspage,Change vehicle, and theDeleteoption.
I've added a screenshot for your visual reference.
Once the trips are moved to the Business page, you can now modify the purpose of the trip.