Why do some refunds take longer?

While the IRS issues 9 out of 10 tax refunds within 21 days, it's possible your return may require additional review and take longer to process.
For some taxpayers, income, and other identity-protection safeguards implemented by the IRS may account for longer wait times. Other things that can delay your refund include, but are not limited to:

• Liens, back taxes, or refund offsets child support
• EIC – Earned Income credit
• College credit
• Errors, inconsistencies, or missing information
• Identity fraud
• Form 8379, Injured Spouse Allocation, which can take 11-14 weeks to process
• Claiming a Recovery Rebate Credit