Hi ajpools,
Welcome to Community! QuickBooks Self-Employed is a great way to manage your business while on the go. I can see how beneficial it would be to have the ability to track the depreciation for your vehicle. I'll be glad to provide provide more information so you're on the right track with your work.
QuickBooks Self-Employed doesn't have the option to set up assets. I recommend reaching out to your accountant for their guidance to record the depreciation for the vehicle you've purchased. If you don't have an accountant, we can help you locate a ProAdvisor near you by following this link.
Please don't hesitate to reach back out with other questions. We'd be happy to help!