The IRS issues most refunds in less than 21 days, although some require additional time. You should only call if it has been:
21 days or more since you e-filed
6 weeks or more since you mailed your return, or when
"Where's My Refund" tells you to contact the IRS
According to the Protecting Americans from Tax Hikes (PATH) Act, the IRS cannot issue EITC and ACTC refunds before February 15. The IRS expects the earliest EITC/ACTC related refunds to be available in taxpayer bank accounts or debit cards on February 27, 2019, if these taxpayers chose direct deposit and there are no other issues with their tax return.