WASHINGTON — The Internal Revenue Service will waive the estimated tax penalty for any qualifying farmer or fisherman who files his or her 2018 federal income tax return and pays any tax due by Monday, April 15, 2019. The deadline is Wednesday, April 17, 2019, for taxpayers residing in Maine or Massachusetts. The IRS is read more IRS waives estimated tax penalty for farmers, fishermen who file returns and pay tax by April 15, 2019