Beginning in 2017, a new law requires the IRS to hold refunds on tax returns claiming the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit (ACTC) until mid-February. Under the change required by Congress in the Protecting Americans from Tax Hikes (PATH) Act, the IRS must hold the entire refund — even the portion not associated with the EITC and ACTC — until at least Feb. 15. This change helps ensure that taxpayers get the refund they are owed by giving the agency more time to help detect and prevent fraud.

Source: IRS Urges Taxpayers to Check Their Withholding; New Factors Increase Importance of Mid-Year Check Up