Why isn't calculated shipping working on my site?

[whyitnotwork]

I have my product dimensions set up, shipping box dimensions set up, and UPS calculated shipping zones set up correctly based on all of the Shopify documentation but I still get the error message of "Items cannot be shipped to your address" when testing.

Any suggestions? Would be much easier if there was a contact from Shopify rather than scouring chat boards trying to find where I possibly could have messed up.

@Shopify 

[Anindita]

Hi @whyitnotwork,

Kindly ensure that your locations have the "Fulfill online orders from this location" option checked. If you try and add a product to your cart that is only featured at locations that do not have online orders enabled, then an error will be returned at checkout.

Also, make sure that you have eligible shipping options for the regions you've added to your shipping zones. If there is no eligible rate for the products in the customer's cart then they will not be able to select a shipping method at checkout. This may happen, for example, if you have shipping rates based on weight, but the customer's cart is too heavy or light for any of the shipping rates featured.

If once you've checked all of this the error still appears, reach out to Shopify support team directly.