To get to the Earned Income credit in TurboTax go to:
1. Personal
2. Deductions and Credits
3. You and Your Family
4. Earned Income Credit (EIC)
5. follow the prompts
When you enter your dependents and your income into your tax return, TurboTax automatically calculates the child tax credit, additional child tax credit, and includes EIC if you qualify for it. So if you qualified for EIC it is already showing in your refund.
If you receive the EITC credit it will appear on line 27 of your 1040.
-follow this link for more information on the Earned Income Tax Credit-
What is an Earned Income Tax Credit & Do You Qualify for It ...