Sept. 30, 2017, is the last day to submit for eligible reimbursements for the July 2016 to June 2017 Flexible Spending Account plan year. The year ended on June 30, 2017, and any outstanding transactions or reimbursement requests must be resolved by Sept. 30, 2017. You may log into your online account or contact customer service at 1-877-451-7244.