November 16
Employers: Deposit Social Security, Medicare and withheld income taxes for October if the monthly deposit rule applies.
Employers: Deposit nonpayroll withheld income tax for October if the monthly deposit rule applies.
Calendar-year exempt organizations: File a 2025 information return (Form 990, Form 990-EZ or Form 990-PF) if a six-month extension was filed. Pay any tax, interest, and penalties due.
December 10
Individuals: Report November tip income of $20 or more to employers (Form 4070).