1. Setup the Fedex Account of the Parent Location
-Navigate to Setup > Accounting > Shipping
-Select Parent Location on Location field
-Fill out the fields especially the Fedex Account Number field
2. Setup the Child Location
-Navigate to Setup > Company > Locations > New
-Select Parent Location on Sublocation of
-Fill out the fields
Note: On the Address tab copy the exact Address of the Parent Location.
3. Use the Child Location on Transactions.