Check's in the mail? report finds employers owe billions in federal payroll taxes.

In a report from the Government Accountability Office, congressional investigators say 1.6 million businesses did not send taxes to the IRS regarding employees' wages, Social Security and Medicare payments.

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Employers owe the IRS about $58 billion, over a 10-year period, in federal payroll taxes from employees' wages, according to the report, which adds that the number of employers with substantial payroll tax debt has ballooned for various...