07/15/2026
Not every extension runs to October 15. If you run a partnership or S corporation, your extended return is due a month earlier than the rest: September 15.
It's an easy deadline to miss. The end of summer, fall rush starting, and all of a sudden, the extra time you thought you had is gone.
Not sure about your extension deadline? Call Clary's Tax Service to handle your business and personal returns this summer to stay ahead of the curve!