How long should I wait for the IRS to process my refund before asking questions?

[zvant99]

“We received your tax return and are reviewing it. If we need additional information, we'll mail a notice with further instructions.”. How do I know if they have sent mail?

[LenaH]

Typically, the IRS takes up to 21 days to process an e-filed return. However, there may be delays if your return needs corrections or an extra review. If it's been more than 21 days since you e-filed, then please call the IRS directly at 1-800-829-1040. 

Although the IRS does not post every letter and notice they mail, you may be able to see if they sent you any correspondence on your Online Account. 

Why is my refund taking longer than 21 days?