Claims for reimbursement for any expenses from any of the benefit plans must be submitted to Sun Life within 90 days of the end of the calendar year in which the expense is incurred.   This deadline applies to 2017 claims made under the Dental Plan, Health Plan or Flexible Spending Program (Health Spending Account or Personal Spending Account). This means that the deadline for submitting claims incurred between January 1 and December 31, 2017 is March 31, 2018.