The IRS typically updates refund status on their "Where's My Refund?" tool about 24 hours after an electronically filed tax return is accepted. For paper-filed returns, the status is usually updated around 4 weeks after filing. The IRS updates this refund status tool once daily, usually overnight, so checking multiple times a day is unnecessary. Most e-filed refunds with direct deposit are issued within 21 days, but this can be delayed if additional review or corrections are needed, such as issues with earned income tax credits or child tax credits. Refund status updates move through stages like "Return Received," "Refund Approved," and "Refund Sent." To check the refund status, taxpayers need their Social Security number or ITIN, filing status, and the exact refund amount from their tax return. If the refund status is delayed beyond 21 days for e-filed returns, the IRS recommends contacting them for further assistance.