If you claimed an Earned Income Tax Credit and/or an Additional Child Tax Credit and filed before February 15, 2019, you’ll get your refund the week of February 27 at the earliest. The IRS states they will begin issuing tax refunds on returns with the EIC or Additional Child Tax Credit on February 27, 2019.
According to the IRS on taxpayers claiming Earned Income Tax Credit or the Additional Child Tax Credit- https://www.irs.gov/pub/irs-pdf/p2043en.pdf
The IRS expects the earliest EITC/ACTC related refunds to be
available in taxpayer bank accounts or on debit cards starting
on Feb 27, 2019, if they chose direct deposit and there are no
other issues with their tax return.
Some 2018 federal refunds will be delayed due to the PATH Act
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