From the IRS:
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, 2018, if these taxpayers chose direct deposit and there are no other issues with their tax return.
Where's My Refund? on IRS.gov and the IRS2Go mobile app will be updated February 17 for the vast majority of early filers who claimed the Earned Income Tax Credit or the Additional Child Tax Credit. These taxpayers will not see a refund date on Where's My Refund? or through their software packages until then. The IRS, tax preparers and tax software will not have additional information on refund dates, so Where’s My Refund? remains the best way to check the status of a refund. Where’s My Refund? is only updated once daily, usually overnight, so checking it more often will not produce new or different results.
IRS e-file to open January 29, 2018
The 2018 tax season is here. In efforts to keep you up to date, below is information regarding refund delays that are expected. It is important to remember that you can still have your tax return prepared and e-filed prior to January 29.
The most current information from the IRS regarding filing delays, refunds, scams, etc.