October 15 –  Electing Large Partnerships

File a 2014 calendar year return (Form 1065-B). This due date applies only if you were given an additional 6-month extension. March 16 was the due date for furnishing Schedules K-1 or substitute Schedule K-1 to the partners.

October 15 – Social Security, Medicare and withheld income tax

If the monthly deposit rule applies, deposit the tax for payments in September.

October 15 – Nonpayroll Withholding

If the monthly deposit rule applies, deposit the tax for payments in September. Read More