The IRS has released the fiscal year 2013 Data Book, which includes an update of the agency’s activities for the year. 

According to the IRS, “The report describes activities conducted by the IRS from Oct. 1, 2012, to Sept. 30, 2013, and includes information about returns filed, taxes collected, enforcement, taxpayer assistance and the IRS budget and workforce, among others. 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 colle."

The book can be accessed via2013 Data Book