At Jackson Hewitt, the charge for a basic tax return begins at $48.
Jackson Hewitt offers free electronic filing, tax-preparation training, and tax audit representation.
By 1992 Jackson Hewitt had 515 offices in almost to 30 states and was preparing 311,000 returns for taxpayers per year.
Jackson Hewitt provides its customers with tax return preparation services and electronic filing.
Jackson Hewitt said in the filing that it was cooperating fully with the inquiry.
The lawsuits did not name Jackson Hewitt as a defendant.
Within the last year, Jackson Hewitt's stock has traded as low as $3.75.
But Jackson Hewitt, which was founded in 1982, has been growing rapidly.
Jackson Hewitt did not return repeated phone calls seeking comment.
In 1988, the company changed its name to Jackson Hewitt.