There are certain forms that when you file your return they will hold it up
to check it out for fraud mainly the earned income credit and the child tax credit
and a couple of other forms. So if you filed your return with any of those forms
attached it definitely will hold it up
For more on the timing of your refund please see this TurboTax FAQ. There are instances where tax returns will take longer than 21 days for the IRS to process and release.
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