How do I activate shipping?

I've probably missed something simple but I can't seem to activate the shipping in my cart. I've set up a USPS shipping Plugin but when I go to the cart on the front end, it just says "Sorry, currently there is no shipping options available. Please contact with admin for details. Add Comments About Your Order."

What steps do I need to follow or what might I be missing to make this shipping option available on the front end?

Thanks for any help,

Eric

Dear Eric,

I think the reason because you didn't setup the USPS shipping plugin properly. Please submit a new ticket to EShop category to send me the your site information so I can help you to check and tell you the reason.

Hope to hear back from you soon.

Sincerely, Giang