The deadline to file tax returns for those who have received extensions is October 15, 2025. Taxpayers who requested an extension by the original filing deadline of April 15, 2025, have until this date to file their tax returns without penalties. It is important to note that an extension to file does not extend the time to pay any taxes owed, which were still due by April 15, 2025. Paying taxes by the original deadline helps avoid interest and penalties. This October 15 deadline is the common extended deadline for federal tax returns in the United States for the 2024 tax year (filed in 2025).