All businesses. Give annual information statements to recipients of certain payments you made during 2017. Payments that are covered include amounts paid in real estate transactions (Forms 1099-S); amounts paid in broker and barter exchange transactions (Forms 1099-B); and payments to attorneys (Form 1099-MISC, if amounts are reported in box 8 or 14).
Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in January if the monthly rule applies.
Individuals. If you claimed exemption from income tax withholding last year on the Form W-4 you gave your employer, you must file a new Form W-4 to continue your exemption for another year.
Employers. Begin withholding income tax from the pay of any employee who claimed exemption from withholding in 2017 but did not give you a new Form W-4 to continue the exemption for 2018.
All businesses. File paper versions of most annual information statements (Forms 1098, 1099, and others) for certain payments you made in 2017 (due date is April 2 if you are filing electronically).
Partnerships. File a 2017 calendar-year return (Form 1065). Provide each partner with a copy of Schedule K-1 (Form 1065), Partner’s Share of Income, Deductions, Credits, and so on, or a substitute Schedule K-1. 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 and then file Form 1065 by September 17.
S corporations. File a 2017 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, and so on 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 you owe.
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 2018. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2019.
Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in February if the monthly rule applies.