Important 2018 Tax Deadlines

Important Documents

  • Form 1095-A, 1095-B, or 1095-C (Required)
  • Form w-2 and/or 1099-MISC
  • Unearned Income Statements (Form 1099-INT, 1099-DIV, 1099-B, etc)
  • Income Deduction Statements (Property Tax Bill, Mortgage Interest, IRA Contribution, etc.)
  • Schedule K-Is (If you are a shareholder or member of an S-Corp or LLC)

March 15, 2018

Original deadline for partnerships (Form 1065) and S Corporations (Form 1120S


April 17, 2018

Original deadline for C Corporations (Form 1120) and individuals (Form 1040)


May 15, 2018

Original deadline for exempt organizations (Form 990)


August 15, 2018

Final deadline for exempt organizations (with extension)


September 17, 2018

Final deadline for partnerships and S Corporations (with extension)


October 15, 2018

Final deadline for C Corporations and individuals (with extension)



Mary Wong