The IRS website says:
I claimed the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit (ACTC) on my tax return. When can I expect my refund?
"According to the Protecting Americans from Tax Hikes (PATH) Act, the IRS cannot issue EITC and ACTC refunds before mid-February. The IRS expects most EITC/Additional CTC related refunds to be available in taxpayer bank accounts or on debit cards by March 1, if they chose direct deposit and there are no other issues with their tax return. However, some taxpayers may see their refunds a few days earlier. Check Where’s My Refund for your personalized refund date."
https://www.irs.gov/refunds