U.S. GAO: Figure 2: Conceptual Overview of How the Large Business and International (LB&I) Division Selects Tax Returns for Audit
U.S. GAO: Figure 2: Paper-Based and Electronic Tax Payments Using a Financial Agent
U.S. GAO: Figure 1: Cybersecurity Funding at IRS, Fiscal Years 2014 Estimated, 2015 Actual, 2016 Enacted, and 2017 Requested (Dollars in Millions)
U.S. GAO: Figure 4: Major Information Technology Investments by Funding Source, Fiscal Year 2017 Requested (Dollars in Millions)
U.S. GAO: Figure 1: Examples of Six Types of Tax Expenditures
U.S. GAO: Figure 2: Estimated Revenue Losses from Tax Expenditures Compared to Mandatory and Discretionary Spending
U.S. GAO: Overclaims and Underclaims as a Percent of Total Credit Amount
U.S. GAO: Figure 3: Total Amount of Credits Received By Taxpayers, 1999 to 2013
U.S. GAO: Figure 2: Example of a Successful Identity Theft Refund Fraud Attempt
U.S. GAO: Spending Through the Tax Code: How tax expenditures, also known as tax incentives, affect the federal budget
U.S. GAO: Tax Whistleblowers: Tax whistleblowers help the IRS collect billions in underreported taxes. Just how well is the IRS whistleblower program working?
U.S. GAO: 2015 Tax Filing Season: Deteriorating taxpayer service underscores the need for a comprehensive strategy and continued efficiencies
U.S. GAO: Figure 3: Whistleblower 7623(b) Claims Process at the Internal Revenue Service
U.S. GAO: Figure 1: IRS Whistleblower Office Staffing, Fiscal Years 2007 to September 15, 2015
U.S. GAO: Figure 9: ACS Call Site and Support Site Locations
U.S. GAO: Figure 8: IRS Form 1099-K Test and Learn Process
U.S. GAO: Figure 9: Illustration of How IRS Changes the Payment Mix Methodology to Improve Identification of Noncompliant Taxpayers
U.S. GAO: Figure 10: IRS's Conceptual Timeline of Pilot Stages
U.S. GAO: Selected Key Steps in Internal Control
U.S. GAO: Figure 1: Number of Employers That Claimed the Small Employer Tax Credit, 2010-2012
U.S. GAO: Figure 4: Operational Performance of IRS's Major IT Investments
U.S. GAO: Figure 1: Reported Cost Performance of IRS's Major Investments
U.S. GAO: Figure 1: Detecting IDT After Refunds are Issued: Two Examples
U.S. GAO: Figure 2: Illustration of IRS Identity Theft Taxonomy
U.S. GAO: Figure 4: How Assumptions Affect Taxonomy Estimates Based on Data from Information Return Matching
U.S. GAO: GAO's 2015 High Risk List: Enforcement of Tax Laws
U.S. GAO: Figure 1: Numbers of Individual Tax Returns Processed and Full-Time Equivalents (FTE) Devoted to Submission Processing, Fiscal Years 2009 through 2014
U.S. GAO: Figure 2: Call Volume to IRS's Taxpayer Service Telephone Lines and IRS FTEs Devoted to Telephone Service at IRS, Fiscal Years 2009 through 2014
U.S. GAO: Figure 1: Example of the Typical Process for Filing a Tax Return
U.S. GAO: Figure 4: IRS Preliminary Estimates of Attempted Identity Theft Refund Fraud, Filing Season 2013