10/06/2026
: If you filed an extension back in April, this is your 🚨 nine-day warning🚨. Extended individual returns are due October 15. No more extensions after this one, the IRS considers your runway officially over.
This is also the deadline to fund a SEP-IRA or solo 401(k) for 2025 if you're self-employed and filed an extension. Worth checking before the window closes, not after.
If you haven't sent us your documents yet, now's the time, not the 14th.