Are you referring to Box 12d? What you do with the information will depend on the code associated with Box 12.  Provide the code to this thread for assistance in resolving your issue.

You don't enter Lyft or Uber under W2 section.

How to enter Lyft tax info

https://ttlc.intuit.com/community/self-employed/help/how-do-i-enter-my-lyft-tax-information/01/27139

How to get the Lyft discount

https://ttlc.intuit.com/community/account-management/help/why-isn-t-my-lyft-discount-being-applied-t...

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--Sideca...

You will need to file a schedule C in your personal tax return for self employment income.  You will need to use the Self Employed Online version to fill out schedule C or any of the Desktop programs.

Here is some reading material……

IRS information on Self Employment….

http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Self-Employed-Individuals-Tax-Center

Pulication 334, Tax Guide for Small Business

http://www.irs.gov/pub/irs-pdf/p334.pdf

Publication 535 Business Expenses

http://www.irs.gov/pub/irs-pdf/p535.pdf