If you qualify for earned income credit the software adds it to your refund automatically after you enter the income you earned and the information for the dependents you are claiming.
https://ttlc.intuit.com/questions/1899157-what-are-the-qualifications-for-the-earned-income-credit-e...
https://www.irs.gov/credits-deductions/individuals/earned-income-tax-credit/use-the-eitc-assistant
If you are referring to the changed EIC per the newly passed tax law---that goes into effect for your 2021 tax return ---next year.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
