Do I only need to enter my 1099 NEC from Uber eats, or do I need to enter my gross pay as well?

Uber did not withhold tax from your pay.   You have self-employment income.

https://ttlc.intuit.com/questions/2926899-how-does-my-side-job-affect-my-taxes

https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/26653

https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922

https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax

https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c

https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct

https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs

https://turbotax.intuit.com/tax-tools/calculators/self-employed/

Tax Tips for Uber, Lyft, Sidecar and other Car Sharing Drivers FAQ

 https://turbotax.intuit.com/tax-tools/tax-tips/Self-Employment-Taxes/Tax-Tips-for-Uber--Lyft--Sidecar-and-other-Car-Sharing-Drivers/INF28820.html 

https://ttlc.intuit.com/community/charges-and-fees/help/how-can-i-apply-my-uber-discount-to-my-turbotax-account/00/27505

  How do I enter my expenses from my Uber Tax Summary into TurboTax Self-Employed Online?

·         What self-employed expenses can I deduct?

If you have 1099-NEC for UBER Eats, it should have your total income from that job in Box 2; however, if you did other work, you should have gotten separate documentation for that other job. 

If you received a 1099-NEC, you will be considered Self-Employed and be assessed both income tax and self-employment taxes.  

Self-employment taxes an additional 15.3%. The rate consists of two parts: 12.4% for social security (old-age, survivors, and disability insurance) and 2.9% for Medicare (hospital insurance).

On the sidebar 

1. Select Federal 
2. Wages & Income 
3. Select Wages and Salaries, or Revisit 
4. Scroll to Other Common Income
   1. Refunds Received for State/Local Tax Returns
   2. Form 1099-NEC
   3. Form 1099-MISC
   4. Form 1099-K
5. Verify that you do have a 1099-NEC [Yes]
6. You may have to upgrade your software.
7. The next screen is to [Add a 1099-NEC]
8. Enter your information.