8002 is a reject code used by the Internal Revenue Service in cases concerning the refund of tax paid by an individual. The rejection could be due to failed authentication and may require subsequent account analysis. 8002 concerns taxpayers who have filed returns at least 3 weeks ago through electronic returns. The refund delays usually increase because of lot of false filings and authentication failures and one can contact the customer service of IRS by providing the reject code 8002. The system problems in IRS could also cause the accurate info from being stored and IRS gets this fixed as soon as possible.