IRS Service Center Notices Issued
For Math Errors and Under-Reporting
Adjustments From Computerized
|Fiscal Year||Returns Filed*||
Source: IRS March 26, 2001 Submission to Senate Finance Committee; September 2002 submission to IRS Oversight Board; "Report to Congress: IRS Tax Compliance Activities," July 15, 2003, Internal Revenue Service, Department of the Treasury; FY 2002-2012 IRS Data Books. Return counts represent prior calendar year filings based upon internal IRS reports.
*Expanded math error authority was implemented in calendar
year 1997 for tax year 1996; data prior to FY 1998 does not include earned
income tax credit (EITC) or taxpayer identification number (TIN)
Return counts are for prior calendar year.
**Spike caused by taxpayer confusion with the advance payment of the rate reduction credit.
***Basis for counts revised between 2003 and 2004 to exclude prior year returns. If 2003 had been reported using same definition, would have been 4,024,981. Spike in 2004 largely due to large jump in child care credit math errors. Figures for 2005 and 2006 now count notices rater than math errors since a single return may have more than one error. If rate had been based on math errors in 2006, it would have been 3.1, instead of 2.4.
****Basis of counts changed from number of contacts to cases closed in 2004 and later years.
***** Math errors jumped largely because of a high volume of errors related to the rebate recovery credit from the Economic Stimulus Act of 2008. Some taxpayers not required to otherwise file, filed a return to receive this credit. The math error rate uses the return counts in brackets which includes returns filed only to receive the credit in addition to regular returns.
† Math errors for the Making Work Pay Tax Credit, a refundable tax credit based on earned income, accounted for a majority of these errors. The credit frequently was not initially claimed so IRS automatically computed and applied the refundable tax credit for eligible taxpayers.
Note that "na" means not available.