Topic Tag: underpayment penalties Search for: Viewing topic 1 (of 1 total) Topics Freshness IRS automatically waiving underpayment penalties for more than 400,000 taxpayers Started by: Consistent | Latest by: Consistent in: Government 1 posts, 1 voices 4 years, 8 months ago Viewing topic 1 (of 1 total) You must be logged in to create new topics.