Tax Calendar September 2016
Individuals. If you have an automatic six-month extension to file your income tax return for 2015, file Form 1040, 1040A, or 1040EZ and pay any tax, interest, or penalties due.
Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in September if the monthly rule applies.
Electing large partnerships. If you were given an additional six-month extension, file a 2015 calendar-year tax (Form 1065-B).
Employers. For Social Security, Medicare, and withheld income tax, file Form 941 for the third quarter of 2016. Deposit any undeposited tax. (If your tax liability is less than $2,500, you can pay it in full with a timely filed return.) If you deposited the tax for the quarter in full and on time, you have until November 10 to file the return.
For federal unemployment tax, deposit the tax owed through September if more than $500.