Upcoming Important Dates

By Kristin Waits February 20, 2018

Important Dates to Keep in Mind


  • Due date for Calendar Year Partnership (1065) and S-Corporation (1120S), may file an extension until 9/17/18
  • File Form 2553 to elect to be treated as an S-Corporation beginning with calendar year 2018


  • 1040 Individual income tax deadline.  Due date for all calendar year personal tax returns.  If filing an extension, remember that an extension is an extension of time to file, not pay
  • 1st Quarter Personal estimated payment due date.  If required to pay estimated taxes, this is the first installment of 4 Quarters
  • 1st Quarter Corporate estimated payment due date
  • Form 1041 deadline (Estates and Trusts), may extend to 10/1/18
  • FBAR FinCEN Form 114 deadline (Report of Foreign Bank and Financial Accounts), may receive automatic extension until 10/15/18
  • Form 1120 (C-Corporation deadline), may file extension to 10/15/18


  • Form 941 deadline (payroll tax)


  • Form 990 deadline, may extend to 11/15/18