How do I set up and activate shipping carriers?
Visit Admin > SiteInfo (tab) > Carriers
Here, you will input your origin address. This is the address carriers will designate as your shipping from address.
Note!
If you are drop shipping products, contact your project manager to discuss the supplier setup and business rules associated with drop shipping. . 
Next, enable the shipping options that you offer by checking the corresponding boxes below.
To finish activating shipping options, you should register with the shipping carriers.
Note2!
If you want to set up custom shipping options, (discounted, free shipping and different shipping options for different customers) visit the KB article: How do I set up custom shipping options?.
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