You will not receive a W-2 for Door Dash. You are an independent contractor for Door Dash. Depending on how much you earned they may or may not even issue a 1099NEC to you, but your Door Dash income must be entered on your tax return.
All of your income must be on the same tax return
so if you are getting a W-2 from another job, that goes on the same return. Employers have until February 1 to issue W-2's so wait for your W-2.
https://ttlc.intuit.com/questions/2903027-how-do-i-report-income-from-self-employment
https://ttlc.intuit.com/questions/2926899-how-does-my-side-job-affect-my-taxes
https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922
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/2902389-why-am-i-paying-self-employment-tax