KEY POINTS
  • About 15 million taxpayers took an extension this year, pushing the due date for their 2018 return to Oct. 15.
  • In a handful of cases, it made sense for people to wait, including small business owners and filers with complicated returns.
  • If you miss the deadline, you could be on the hook for a 5% failure to file penalty.

If you asked the IRS for six more months to work on your 2018 tax return, you're about to run out of time.

This spring, about 15 million taxpayers asked the IRS for an extension on their 2018 tax return.