Where do I claim my mileage for Lyft/ Ride Share gig ?

[xmasbaby0]

That will go on your Schedule C.

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... 

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

What self-employed expenses can I deduct?

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/...

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/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs