How do I get the account name to populate as the ship to company?
If the app is set to run on the Leads, Accounts, Contacts, or Opportunities objects, without using the Custom Address Source feature, the Company name will populate automatically.
If you are using the Custom Address Source feature, you will need to reference the field in the Custom Address Source object:
If the Company name field is on an object related to the one you are shipping from (eg: Case or Order) you will need to use formula fields to pull the Company Name field onto the parent object. (link to formula fields page)