If you entered your income correctly and entered your dependents correctly, then if you qualified for EIC the software would have added EIC to your refund automatically. So check your income amounts and the information you entered about your dependents too.
If you received EIC it is shown on line 18a of your Form 1040.
Did you make a mistake with your income somewhere? What was your filing status? You cannot get EIC if you file married filing separately or if you are someone else's dependent.
Print out your tax return and the worksheets to look them over.
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-get-a-copy-of-a-return-i-filed-thi...
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
**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.**
