Log in to Merchant Dashboard.
Select the delivery settings option in location details.
Delivery fee type:
it may be set in percentage or Doller Value.
Enable tax on Delivery:
Select 'yes' if you want to charge tax on the delivery fee and 'no' if you don't want to charge tax on delivery.
Delivery Zone:
Here you can create different zones on the basis of distance coverage. Restaurants can create more than one delivery zone in their delivery setting. Each delivery zone can have multiple price ranges with distinctive delivery charges.
Any numbers or figures should not overlap anywhere while setting up the configuration to avoid any errors.