Tax Fraud and Noncompliance: IRS Could Further Leverage the Return Review Program to Strengthen Tax Enforcement

GAO-18-544 Published: Jul 24, 2018. Publicly Released: Aug 23, 2018.
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Fast Facts

The Return Review Program is one of IRS's key systems for detecting tax fraud and preventing bad refunds—preventing about $4.4 billion in bad refunds during the 2017 filing season.

IRS monitors the program's performance and adjusts it to address new threats, but we found ways to improve and expand use of the program.

For example, we recommended ways to increase the amount of data available to the program, including loading W-2 data into it more frequently and digitizing paper returns. We also recommended using the program for other tax enforcement activities such as selecting returns for audits or checking them for underreported income.

The Return Review Program Screens Individual Tax Returns Before IRS Issues Refunds

Image showing the Return Review Program screening legitimate and fraudulent tax returns.

Image showing the Return Review Program screening legitimate and fraudulent tax returns.

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Highlights

What GAO Found

The Internal Revenue Service's (IRS) Return Review Program (RRP) detects and selects potentially fraudulent returns to prevent the issuance of invalid refunds. According to IRS, RRP uses advanced analytic techniques and various data sources, including prior-year tax returns, to assign multiple scores to individual returns based on characteristics of identity theft and other refund fraud.

The Return Review Program Screens Returns Before IRS Issues Refunds

The Return Review Program Screens Returns Before IRS Issues Refunds

GAO found that IRS routinely monitors RRP's performance and adapts RRP to improve detection and address evolving fraud threats. Each year IRS updates RRP's detection tools to improve accuracy for the next filing season.

IRS has plans to continue developing RRP to further prevent invalid refunds, including using RRP to analyze and detect fraudulent business returns. However, GAO identified other opportunities for IRS to improve RRP's fraud detection and to use RRP for other enforcement activities:

  • RRP's ability to accurately detect and select suspicious returns could benefit from having information on Forms W-2, Wage and Tax Statements (W-2) available for analysis more frequently. As of April 2018, IRS officials said they were drafting but had not yet approved a work request to load W-2s into RRP daily instead of weekly for the 2019 filing season.
  • IRS could collect more information electronically from paper filers. One approach IRS evaluated in 2012 is to digitize some paper returns using barcoding technology, but it has not updated that analysis or expanded it to consider other digitizing technologies. IRS requested that Congress require that returns prepared electronically but filed on paper include a scannable code printed on the return, but Congress had not done so as of May 2018.
  • IRS could apply RRP's capabilities to improve other tax enforcement activities, such as audit selection or underreporting detection. Individuals' underreporting of tax liabilities accounts for hundreds of billions in lost tax revenue. Until IRS evaluates the costs and benefits of expanding RRP to analyze returns not claiming refunds, IRS will not have the information needed to make decisions that could help streamline processes for detecting and treating additional types of noncompliance and fraud.

Why GAO Did This Study

Tax noncompliance, including refund fraud, threatens the integrity of the tax system and costs the federal government hundreds of billions of dollars annually. RRP is IRS's primary pre-refund system for detecting and preventing the issuance of invalid refunds. IRS reported that between January 2015 and November 2017 RRP prevented the issuance of more than $6.51 billion in invalid refunds.

GAO was asked to examine RRP's capabilities. This report (1) describes how RRP detects and selects suspicious returns and prevents invalid refunds; (2) assesses how IRS monitors and adapts RRP; and (3) examines what else, if anything, IRS can do to strengthen RRP and use it to address other enforcement issues.

GAO reviewed IRS plans for RRP and documents on its performance. GAO compared IRS's efforts to federal internal control standards, GAO's Fraud Risk Framework and IRS's strategic plan. GAO interviewed IRS officials who work on and use RRP.

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Recommendations

GAO suggests Congress consider legislation to require that returns prepared electronically but filed on paper include a scannable code. GAO is also making five recommendations to IRS, including that IRS take action to make incoming W-2s available to RRP more frequently, update and expand a 2012 analysis of the costs and benefits of digitizing returns filed on paper, evaluate the costs and benefits of expanding RRP to analyze returns not claiming refunds, and take any appropriate action based on those evaluations. IRS agreed with GAO's recommendations.

Matter for Congressional Consideration

Matter Status Comments
Congress should consider legislation to require that returns prepared electronically but filed on paper include a scannable code printed on the return. (Matter for Consideration 1)
Open
No legislation enacted requiring a scannable code, as of March 2022. In September 2021, a bill was introduced containing a provision which, if enacted, would have imposed this requirement as GAO recommended in July 2018 (section 502 of S. 2782, 117th Cong.). Requiring returns prepared electronically but filed on paper to include a scannable code would allow IRS to scan and digitize information from these returns. It could also strengthen IRS's tax enforcement efforts, resulting in increased compliance revenue.

Recommendations for Executive Action

Agency Affected Recommendation Status
Internal Revenue Service
Priority Rec.
This is a priority recommendation.
The Commissioner of Internal Revenue should increase the frequency at which incoming W-2 information is made available to RRP. (Recommendation 1)
Closed – Implemented
In January 2019 IRS increased the frequency at which incoming W-2 information is made available to RRP. IRS loads W-2 data onto the Information Return Master File (IRMF), which then makes the data available to RRP. In August 2018 we found that IRS provided incoming W-2 information to RRP once per week because this was how frequently IRS loaded incoming W-2 information onto IRMF. IRS officials also told us in August 2018 that the agency planned to increase the frequency at which W-2 information would be loaded onto IRMF. In July 2019, IRS provided documentation demonstrating that the agency had begun loading the information onto IRMF on a daily basis beginning in January 2019. Doing so will enable IRS to expand its efforts to systemically verify wage information reported on tax returns and avoid issuing invalid refunds.
Internal Revenue Service
Priority Rec.
This is a priority recommendation.
The Commissioner of Internal Revenue should update and expand a 2012 analysis of the costs and benefits of digitizing returns filed on paper to consider any new technology or additional benefits associated with RRP's enhanced enforcement capabilities. (Recommendation 2)
Closed – Implemented
IRS agreed with this recommendation and in December 2019, IRS officials reported that the agency plans to begin scanning and digitizing individual tax returns filed on paper beginning in October 2021. Consistent with GAO's recommendation, IRS is also considering additional benefits that digitization of paper returns could have on the Return Review Program's enhanced enforcement capabilities. In November 2018, IRS reported that digitizing paper returns at intake would allow IRS to use the same RRP filtering on all paper and electronic forms, allow more pre-refund audits or investigations, and reduce processing time, among other benefits.
Internal Revenue Service
Priority Rec.
This is a priority recommendation.
Based on the assessment in recommendation 2, the Commissioner of Internal Revenue should implement the most cost-effective method to digitize information provided by taxpayers who file returns on paper. (Recommendation 3)
Open
IRS agreed with GAO's July 2018 recommendation and as of February 2022, is taking steps to implement its digitization strategy and use the Return Review Program's (RRP) capabilities. . As of May 2022, IRS reported that it expects RRP's fraud filters and enhanced enforcement capabilities to be fully connected to certain amended digitized forms in 2022. To fully implement this recommendation, however, IRS must fully digitize paper tax returns at intake. This would allow IRS to reduce processing time, use the RRP fraud filters on all paper and electronic forms, and allow more pre-refund compliance checks or investigations, among other benefits.
Internal Revenue Service
Priority Rec.
This is a priority recommendation.
The Commissioner of Internal Revenue should evaluate the costs and benefits of expanding RRP to analyze individual returns not claiming refunds to support other enforcement activities. (Recommendation 4)
Closed – Implemented
IRS agreed with GAO's July 2018 recommendation, noting that an agency goal is to expand the use of RRP to improve tax compliance and enforcement. IRS reported in January 2022 that it completed its extended evaluation to quantify the potential benefits of expanding RRP. According to IRS data, the evaluation showed an overall 15 percent improvement in taxpayer compliance and other benefits that increased revenue and led to increased efficiencies in IRS's work processes. This analysis is consistent with GAO's recommendation and demonstrates how RRP helps in streamlining the detection and treatment of fraud and can increase taxpayer compliance.
Internal Revenue Service
Priority Rec.
This is a priority recommendation.
Based on the assessment in recommendation 4, the Commissioner of Internal Revenue should expand RRP to support identified activities. (Recommendation 5)
Open
IRS agreed with GAO's July 2018 recommendation, noting that an agency goal is to expand the use of RRP to improve tax compliance and enforcement. In January 2022. IRS reported its completed evaluation identified increased revenue and cost savings from using RRP in certain enforcement activities. As of May 2022, IRS reported that it is also working to connect RRP's expanded enforcement capabilities to digitized amended paper returns. To fully implement this recommendation, IRS needs to continue leveraging RRP capabilities to support other enforcement activities. Fully expanding RRP will help IRS streamline its detection and treatment of fraud and increase taxpayer compliance.

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