Tax Penalty IRS or State Late Filing or Late Tax Payment Penalties Current, Previous Year Late Filing Payment Penalty Calculator The IRS Tax Penalty Calculator Will to Calculate the Amount of Tax You Will Owe the IRS Due to Late Filing or Late Payments. Late Filing or Payment Penalties; What Happens If You File Late? Penalties Due to Late Filing or Late Payment of Taxes. File Something on Time Even If You Can't Pay Anything on Time to Reduce Tax Penalties. Tax Penalty Relief Abated Penalties for 2019, 2020 Taxes Penalty Relief for Most 2019 and 2020 Returns Filed Late. If You Owe Taxes For These Tax Years, File by September 30, 2022. Interest Rates For Late Return Filing or Tax Payments IRS Here Is an Overview on How the IRS Calculates Late Tax Filing Penalties or Late Tax Payments. Generally, Late Filing Penalties Are Higher. TurboTax® is a registered trademark of Intuit, Inc. H&R Block® is a registered trademark of HRB Innovations, Inc.