Hi rlooper,
Thanks for reaching out to us.
QuickBooks Self-Employed app automatically tracks your mileage based on the information you provide in your mobile app. Let me provide you more details so you'll know what information does the IRS requires.
Though Uber does not take out taxes from our earnings, it's up to drivers to track expenses and file taxes. I suggest contacting the IRS to check what information that needs to be entered if you're unable to access any information from the Uber website.
For more information on how to use automatic mileage, please check this article for more information: Use Automatic Mileage Tracking For QuickBooks Self-Employed.
Reach out to us if you need further assistance. I'll make sure to help.