You can just type Schedule C into the search bar at the top of your return and it should give you a JUMP TO link to go directly to it.
To add a business or Schedule C (I have the Home & Business Desktop program which is a little different than the lower versions). So for other versions, look around here (let me know if it's here and you find it.)
Go to Federal tab
Click on Wages and Income
Scroll down to Business Items
You use your own name, address and ssn or business name and EIN if you have one. You should say you use the Cash Accounting Method and all income is At Risk.
After it asks if you received any 1099NEC it will ask if you had any income not reported on a 1099. You should be keeping your own records. Just go through the interview and answer the questions. Then you will enter your expenses.
Here are some links about Uber
Tax Tips for Uber, Lyft, Sidecar and other Car Sharing Drivers FAQ
https://turbotax.intuit.com/tax-tips/self-employment-taxes/tax-tips-for-uber-lyft-sidecar-and-other-...
What do I need from Uber?
https://ttlc.intuit.com/community/uber-or-lyft/help/what-do-i-need-from-uber-to-file-my-taxes/00/271...
Where to enter Uber/Lyft Income
https://ttlc.intuit.com/community/uber-or-lyft/help/where-do-i-enter-my-lyft-uber-income/00/26804
How to enter Uber or Lyft without a 1099
https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/enter-income-ub...
