In TurboTax Home & Business, click the “BUSINESS” tab, then
select “Business Income and Expneses,” and then select “Business Income and
Expenses.” From there, you’ll be able to
add your rideshare income and expenses.
Please see
the TurboTax FAQ "What do I need from Uber to file my taxes?"
below, particularly the "Uber Yearly Summary" dropdown, for
instruction on how to enter the information available to you.
https://ttlc.intuit.com/replies/5802327