March 2018 Tax Deadlines

• March 1 — Farmers & fishermen
  File your 2017 income tax return (Form 1040) and pay any tax due Details
• March 10 — Employees who work for tips
  If you received $20 or more in tips during February, report them to your employer Details
• March 15 — S Corporations
  File a 2017 calendar year income tax return (Form 1120S) and pay any tax due Details
• March 15 — S Corporation election
  File Form 2553, Election by a Small Business Corporation, to elect to be treated as an S corporation beginning with calendar year 2017. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2018.
• March 15 — Partnerships
  File a 2017 calendar year return (Form 1065) Details
• March 15 — Electing larger partnerships
  Provide each partner with a copy of Schedule K1 (Form 1065B), Partner’s Share of Income (Loss) From an Electing Large Partnership, or a substitute Schedule K1. This due date applies even if the partnership requests an extension of time to file the Form 1065B by filing Form 7004
• March 15 — Partnerships
  Electing large partnerships: File a 2017 calendar year return (Form 1065-B) Details
• March 15 — Social security, Medicare, and withheld income tax
  If the monthly deposit rule Page 6 Publication 509 applies, deposit the tax for payments in February.
• March 31 — Electronic filing of Forms W2
  File copies of all the Forms W2 you issued for 2017. This due date applies only if you electronically file.
• March 31 — Electronic filing of Forms W2G
  File copies of all the Forms W2G you issued for 2017. This due date applies only if you electronically file.
• March 31 — Electronic filing of Forms 8027
  File Forms 8027 for 2017. This due date applies only if you electronically file.