What is the extended filing deadline with a valid extension?

by | Feb 21, 2026 | AI Tax Answer Library

Here’s what HIVE AI had to say about “What is the extended filing deadline with a valid extension?”:

Extended filing deadline with a valid extension (Form 4868)

If you timely file a valid automatic extension request (generally Form 4868) by the original due date (usually April 15), your extended federal individual income tax return filing deadline is October 15. 1 2

If October 15 falls on a weekend or legal holiday, the deadline moves to the next business day. 3

Sources

1 – Get an extension to file your tax return
2 – File an extension through IRS Free File
3 – Due dates & extension dates for e-file


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