The two felony counts against Mr. Thomas, Ward 5 Democrat, are detailed in a criminal information document filed Thursday in U.S. District Court. Such a document typically indicates a defendant intends to plead guilty.
Though the document does not detail what Mr. Thomas did with the stolen funds, he had been previously accused of spending them on a luxury SUV, travel and rounds of golf.
The tax return charge accuses him of failing to report $356,000 in income between 2007 and 2009.
Mr. Thomas was also ordered to forfeit an SUV and a motorcycle that were seized last month by federal agents who raided his home.
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