Common Reject Codes - SSN Mismatch

A name doesn’t match Social Security records. (500-01, 503-02, 504-02). [CC]
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A dependent was already claimed on someone else's return or a return already filed. (507-01, 902-01, IND-517-01, IND-516-01, SEIC-F1040-506-02). [CC]
Tips for e-filing state returns that already have been accepted by the IRS. [CC]
An incorrect number was used to identify yourself to the IRS, such as an incorrect prior-year AGI, or identity theft PIN issues. (IND-181-01, IND-180.01, IND-996, IND-183-01). [CC]