Expense approval workflow with department head and notifications


So I am trying to implement the following Expense approval workflow. The Ops team has sent there requirements as listed below:

  1. An employee applies for an expense approval.
  2. Sends in to Dept. Head, where he/she approves or rejects the approval.
  3. Simultaneously, a notification should pushed to accounts manager.

The edits would be done by expense approver role.

Based on this, I’ve created this workflow flowchart, but I am not sure how to implement the notification bit.

Any help would be appreciated.

Thank You.