10/23/2026
Happy World Series. It’s the bottom of the ninth for your 2026 books, and here’s what’s left on the scoreboard:
Nov 2: Q3 payroll tax return, for businesses running payroll
Dec 31: Solo 401(k) employee deferral election, if applicable
Before year-end: final payroll runs for S Corp owners
Informational only, not tax, legal, or accounting advice. State deadlines vary.