The U.S. Government Accountability Office, the investigative arm of Congress, is looking into the “misreporting” of cash contributions to charity by individual taxpayers.

In a summary of the study’s parameters, the GAO said that data from the Internal Revenue Service show that “individual taxpayers frequently overstate deductions and make other errors when reporting cash contributions to charities.”

The agency is working to “identify pros and cons of potential options to improve compliance, including, if possible, their potential impact and costs and burdens on taxpayers, IRS, and third parties.”

The GAO was asked to review the matter by Sen. Max Baucus, the Montana Democrat who chairs the Senate Finance Committee, and Sen. Charles E. Grassley of Iowa, the senior Republican on the finance committee.

The GAO said it was asked to:

To carry out the study, the GAO said it would interview organizations representing charities and would talk with IRS officials “to identify any challenges they face in addressing noncompliance” with tax laws.

The agency also said it would review IRS documents and research, including data from the IRS’s National Research Program, which measures taxpayer compliance with the law. The GAO said it might look at a statistical sample of taxpayer examination files from the National Research Program.

The GAO said it would review the “IRS’s compliance programs that address charitable cash contribution misreporting” by reviewing documents, enforcement data, and tax forms and publications.

Michael Brostek, director of tax issues for the GAO, said the study could be finished within the next couple of months and most likely would be made public.