Corporate Tax Filing Deadline 2024 Extension. Fiscal year corporate taxpayers must file their tax returns by the 15th day of the fourth month following the end of their tax year. The new february 3, 2025, deadline applies to individuals with a valid extension to file their 2023 return through october 15, 2024.
You have right up until tax day to file for an extension. Partnerships and s corporations must apply for an extension by march 15, 2024.