A disbarred Manhattan attorney was among seven taxpayers accused Thursday — tax filing day — of parking assets in secret Swiss bank accounts and concealing profits from the Internal Revenue Service.

The government charged that Kenneth Heller, 80, had evaded $2.3 million in taxes on income earned from $26.5 million he had deposited with the Swiss banking giant UBS. Heller, a maritime law expert, was disbarred in 2004 for what the Appellate Division, 1st Department, described as “reprehensible, unprofessional behavior” that included threatening judges, defying court orders and disrupting the legal process.