MARCH 2019

March 15

Partnerships. File a 2018 calendar-year return (Form 1065). Provide each partner with a copy of Schedule K-1 (Form 1065), Partner’s Share of Income, Deductions, Credits, etc., or a substitute Schedule K-1 (Form 1065). If you want an automatic six-month extension of time to file the return and provide Schedule K-1 or a substitute Schedule K-1, file Form 7004. Then, file Form 1065 and provide each partner with a copy of his or her final or amended (if required) Schedule K-1 by September 16. 

S corporations. File a 2018 calendar-year income tax return (Form 1120S) and pay any tax due. Provide each shareholder with a copy of Schedule K-1 (Form 1120S), Shareholder’s Share of Income, Deductions, Credits, etc., or a substitute Schedule K-1. If you want an automatic six-month extension of time to file the return, file Form 7004 and deposit what you estimate that you owe. Then, file the return, pay any tax, interest, and penalties due, and provide each shareholder with a copy of the Schedule K-1 (Form 1120S) by September 16.

S corporation election. File Form 2553, Election by a Small Business Corporation, to choose to be treated as an S corporation beginning with calendar year 2019. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2020.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in February if the monthly deposit rule applies.

 

APRIL 2019

April 15

Individuals. File a 2018 income tax return and pay any tax due by April 15 (if you live in Maine or Massachusetts, the filing deadline is April 17). If you want an automatic six-month extension of time to file the return, file Form 4868, Application for Automatic Extension of Time to File U.S. Individual Income Tax Return. Then, file Form 1040 by October 15.

If you are not paying your 2019 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2019 estimated tax. Use Form 1040-ES.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in March if the monthly deposit rule applies.

Household employers. If you paid cash wages of $2,100 or more in 2018 to a household employee, file Schedule H (Form 1040) with your income tax return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H if you paid total cash wages of $1,000 or more in any calendar quarter of 2017 or 2018 to household employees. Also report any income tax you withheld for your household employees.

Corporations. File a 2018 calendar-year income tax return (Form 1120) and pay any tax due. If you want an automatic six-month extension of time to file the return, file Form 7004 and deposit what you estimate that you owe.

Corporations. Deposit the first installment of estimated income tax for 2019.