Coupon not showing

-- url of the page with the problem -- : morenadancewear.com.au/
-- HikaShop version -- : 2.3.0 Business
-- Joomla version -- : 2.5.19

I have created a coupon with a unique code and I had enabled it. However, it does not seem there is any field on checkout for Coupon, am I missing anything here?
Regards

Looks like "Coupon" isn't part of your checkout workflow, yet.

In the HikaShop backend, go to System -> Configuration -> Checkout tab, and drag and drop the "Coupon" field to where you want it in the workflow. Save, then try checking out on your site again, the field should be there.