The failure to get a revamped computer program online to screen for fraudulent 2006 tax returns will cost the federal government between $200 million and $300 million, the Internal Revenue Service has estimated.

A federal court has barred a Jackson Hewitt franchise from preparing federal income tax returns claiming an improper federal income tax exemption for casino proceeds paid to Native Americans.

The Internal Revenue Service has ruled that employer incentives encouraging their employees to purchase environmentally friendly hybrid cars, are considered taxable compensation.

The Senate Finance Committee pushed hard for answers from a tax policy nominee on when the Treasury Department will supply recommendations on an overhaul of the tax system, and how best to meaningfully improve the nation's tax compliance.

National Taxpayer Advocate Nina E. Olson has delivered a report to Congress outlining the priority issues her office will tackle in the coming fiscal year.

The government got a big victory in the U.S. Court of Federal Claims, winning a reversal of a 2004 decision in a case legal experts say will go a long way in defining what constitutes an illegal tax shelter by reestablishing the economic substance test.

Prosecutors are looking into Deutsche Bank's role in providing a lesser-known questionably tax shelter sold through a Silicon Valley firm, according to published reports.