If you are receiving earned income credit or the additional child tax credit as part of your refund, the IRS is holding your refund as a fraud prevention measure as a result of a law called the PATH act. Do not expect your refund until at least late February.
https://ttlc.intuit.com/questions/3397970-path-act-delayed-refunds-for-some-filers
**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.**