In order to accurately track the Kelly Blue Book value of vehicles, you need to be able to provide the vehicle's current mileage
Edit: I upvoted this. At first, I thought it was still in Early Access, but it has gone out to all users now. So vote it up everyone.
Workaround:
I have found that when you get a lot more miles on the car that you can simply make the vehicle account manual and reconnect it, which allows you to update the mileage..
This is definitely a needed feature!
Mileage can now be updated for KBB vehicle accounts!
https://support.simplifi.quicken.com/en/articles/13172060-using-kelley-blue-book-to-track-automobile-values-on-the-web-app#h_536f8d6b5c
https://support.simplifi.quicken.com/en/articles/13225208-using-kelley-blue-book-to-track-automobile-values-on-the-mobile-app#h_826db95354