Some returns take additional time.
Please verify that all information submitted is correct
Also, If you are married filing jointly you may have to track your refund on “where’s My Refund” page with your spouse’s taxpayer information.
https://sa.www4.irs.gov/irfof/lang/en/irfofgetstatus.jsp
The IRS Website also says the following:
“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
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. “
https://www.irs.gov/refunds
