How many United States citizens must file an income tax return?

According to IRS article, 'E-File and Other Electronic Options for 2009', the IRS projected in January 2009 that about 140 million individual income tax returns will be filed this year. Of that total, the IRS is expecting e-file returns to exceed 90 million, which was the record for e-filed individual returns in 2008.

For more information on IRS statistics, go to the IRS Newsroom at www.irs.gov/newsroom. Select Facts and Figures from the left column. In the Facts and Figures screen, select IRS Data Books. Table 2 is Number of Returns Filed by Type of Return in 2008 and 2007.