http://rw-rw.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/business/help/1324891268731018
Once you build your checkout URL, you can test it by adding products and promo codes. Make sure that the correct products, quantities and prices appear on your website’s checkout page and that any promo codes have been applied.