Massachusetts tax preparer Yves Isidor has been sentenced to 18 months in prison for orchestrating a years-long scheme of filing fraudulent tax returns that cost the federal government nearly half a million dollars. The Somerville resident operated a tax preparation business that systematically falsified client returns without their knowledge or consent.
According to the Justice Department’s statement, Isidor prepared more than 1,500 false returns between 2012 and 2019, fabricating everything from medical expenses to charitable contributions. “A Massachusetts tax return preparer was sentenced today to 18 months in prison for filing false tax returns for clients,” the Office of Public Affairs confirmed on September 4.
Pattern of Deception
How did the scheme work? Isidor, who ran Tax Realty Pro in Malden, Massachusetts, routinely inflated deductions and invented expenses on his clients’ returns. He particularly targeted self-employed clients and rental property owners, creating fictitious deductions that resulted in a $443,000 loss to the U.S. Treasury.
The fraud wasn’t subtle. Isidor charged between $100 to $500 per return while operating his Malden-based business, where he filed more than 1,200 false tax returns over a four-year period. His methods included adding fabricated deductions for medical expenses, property taxes, charitable donations, and unreimbursed employee expenses — all without his clients’ knowledge.
“At trial, clients testified that Isidor falsified their individual tax returns without request or consent,” noted prosecutors. Six taxpayers took the stand to confirm they had never discussed or approved the false items Isidor added to their returns.
The case against Isidor was bolstered by an undercover agent who witnessed the tax preparer create a fraudulent return in real time. This direct evidence helped prosecutors build their case against the Somerville resident.
Sentencing and Aftermath
U.S. District Judge William G. Young handed down the 18-month prison sentence, which will be followed by three years of supervised release. The case was jointly prosecuted by the Justice Department’s Tax Division and the U.S. Attorney’s Office.
The conviction comes amid increased scrutiny of tax preparation fraud nationwide. Such schemes typically peak during tax filing season but can have lasting consequences for both perpetrators and unwitting clients whose returns contain falsified information.
While Isidor faced potential penalties of up to three years in prison and fines up to $250,000, the court settled on the 18-month sentence. That said, the damage to his professional reputation and the impact on his former clients extends well beyond his time behind bars.
“Yves caused a loss to the United States of $443,000,” the Office of Public Affairs stated — a figure that represents not just financial harm but a breach of trust for the hundreds of taxpayers who relied on his services.
For the many clients who had their tax returns falsified without their knowledge, the case serves as a stark reminder of the importance of reviewing tax documents before they’re submitted to the IRS — even when prepared by a professional.

