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During fiscal year 2013, the IRS collected almost $2.9 trillion in federal revenue and processed 240 million returns, of which 151 million were filed electronically. Out of the 146 million individual income tax returns filed, almost 83 percent were e-filed. More than 118 million individual income tax return filers received a tax refund, which totaled almost $312.8 billion. On average, the IRS spent 41 cents to collect $100 in tax revenue during the fiscal year, matching low-cost results for 2008 and 2001.
The IRS examined just under one percent of all tax returns filed and about one percent of all individual income tax returns during fiscal year 2013. Of the 1.4 million individual tax returns examined, over 39,000 resulted in additional refunds. The IRS provided taxpayer assistance through 456 million visits to IRS.gov and assisted almost 91 million taxpayers through its toll-free telephone helpline or at walk-in sites.