The penalty for the late filing of IRS Form 2350, also known as Application for Extension of Time to File U.S. Income Tax Return, varies depending on the circumstances. If you file your tax return after the original due date but within the granted extension period, generally, no late filing penalties will be imposed. However, interest may accrue on any unpaid tax liability. It's important to note that Form 2350 provides an automatic extension of time to file your tax return, but not an extension of time to pay any taxes due. If you don't pay the taxes you owe by the original due date, there might be penalties and interest associated with late payment. To avoid any penalties or interest charges, it is always recommended to file your tax return and pay any taxes owed as soon as possible.