Jackson Hewitt Tax Service is battling four lawsuits that accuse it of suppressing wages and violating federal antitrust law with its no-poaching rule for tax preparers.

Jackson Hewitt operates some 6,000 offices nationwide, and each franchise operator is restricted from hiring or soliciting employees from another Jackson Hewitt office. The suits, brought on behalf of current and former Jackson Hewitt employees, call that rule “a naked restraint of competition and a per se violation of the antitrust laws.”