According to the Internal Revenue Service (IRS), the tax filing deadline for 2021 tax returns will be April 18, 2022. By law, a celebrated holiday in Washington D.C. impacts tax deadline for all taxpayers just as federal holidays do. In Washington D.C. April 15th is celebrated as Emancipation Day holiday; therefore, the tax deadline has been adjusted to Monday, April 18, 2022. If you are a Maine or Massachusetts taxpayer, the deadline is Tuesday, April 19, 2022 due to Patriot