You may delete a goal (without closing your entire Endowus account) by following these steps:
Redeem the entire investment portfolio for the Goal: You can do this via Invest | Redeem | Transfer > Redeem > Select Goal > Select Account(s) > Check the box for full redemption
Once the full redemption has completed, you may go to the Goal's dashboard > Manage Goal (top right-hand corner) > Select Delete Goal
Please note that you can only delete a goal:
If there are other remaining goals on your account – if you only have one existing goal, you will not be able to delete that one until you create another goal;
That does not have any pending and/or processing transactions; and