Date: March 12, 2025
Contact: [email protected]
LAS VEGAS — The operator of a Las Vegas tax return preparation business pleaded guilty today to preparing false income tax returns on behalf of her clients causing at least $550,000 in tax loss.
According to court documents and statements made in court, since at least 2007, Keisy Altagracia Sosa has operated National Tax Service, a tax return preparation business in Las Vegas, Nevada. From 2016 to 2021, Sosa prepared and filed with the IRS false tax returns on behalf of clients. These tax returns included falsely claiming dependents; claiming fictitious Schedule A expenses, such as sales taxes paid and unreimbursed employee expenses; and claiming fictitious Schedule C expenses purportedly associated with a business operated by the taxpayer. Sosa continued to prepare false returns even after the IRS sent multiple letters notifying her that returns she filed appeared inaccurate, informing her that she may not be meeting her due diligence requirements, reminding her of those obligations, and directing her to resources with more information about those obligations. Sosa caused at least $550,000 in tax loss to the IRS.
Sosa pleaded guilty to one count of aiding and assisting in the preparation and filing of a false tax return. Chief United States District Judge Andrew P. Gordon scheduled sentencing for June 11, 2025. The maximum statutory penalty is three years in prison as well as a period of supervised release and monetary penalties. A federal district court judge will determine any sentence after considering the U.S. Sentencing Guidelines and other statutory factors.
Acting United States Attorney Sue Fahami for the District of Nevada and Special Agent in Charge Carissa Messick for the IRS Criminal Investigation (IRS-CI) Phoenix Field Office made the announcement.
This case was investigated by IRS-CI. Assistant United States Attorneys Tony Lopez and Benjamin Shiver are prosecuting the case.
Taxpayers should remain vigilant against unscrupulous tax preparers. Tax preparers that promise larger refunds than their competition may place taxpayers at risk of being part of a criminal scheme. The IRS urges all taxpayers to verify the information on their tax return is correct before filing.
IRS-CI is the criminal investigative arm of the IRS, responsible for conducting financial crime investigations, including tax fraud, narcotics trafficking, money-laundering, public corruption, healthcare fraud, identity theft and more. IRS-CI special agents are the only federal law enforcement agents with investigative jurisdiction over violations of the Internal Revenue Code, obtaining a 90% federal conviction rate. The agency has 20 field offices located across the U.S. and 14 attaché posts abroad.