Get your taxes done using TurboTax

You have self-employment income from DoorDash, and you will owe self-employment tax for Social Security and Medicare, since that is not being withheld from your pay.   You will also prepare a Schedule C for your expenses -- like mileage -- that may "offset" some of the income.

You are going to need to use online Premium software or any version of the CD/download in order to enter that self-employment income and prepare the Schedule C.   You will also enter your W-2 income on the same tax return.

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

https://ttlc.intuit.com/turbotax-support/en-us/help-article/form-1099-nec/1099-nec/L5qTsBiSe_US_en_U...

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/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/