If you claimed the Earned Income credit or Additonal Child Tax credit there is a delay in receiving refunds.  Taxpayers who claim the Earned Income Tax Credit or the Additional Child Tax Credit may experience a refund hold. According to the Protecting Americans from Tax Hikes (PATH) Act, the IRS cannot issue these refunds before mid-February. The IRS expects the earliest EITC/ACTC related refunds to be available in taxpayer bank accounts or debit cards starting February 27, 2019, if these taxpayers chose direct deposit and there are no other issues with their tax return.

See the following for more information from the IRS:

https://www.irs.gov/individuals/refund-timing