The IRS has released Publication 1304 which reports on statistical data from a sampling of the 145.4 million individual income tax returns filed for tax year 2011. Tax filings are up, adjusted gross income has risen and IRS collections continue to increase. The report provides information regarding sources of income, adjusted gross income, exemptions, deductions, taxable income, income tax, modified income tax, tax credits, self-employment tax and tax payments. The report also describes data based on classifications such as marital status and age.