Where does the "Ship To Address" come from on an expense AP invoice created by import from iExpense?

Where does the "Ship To Address" come from on an expense AP invoice created by import from iExpense? I have read that location does not pull over from iExpense into Payables, and that the "Ship To" on the invoice comes from the "Default Place of Supply". Where is this defined? Somewhere at the Employee/Supplier level? Where can we navigate to see this setup?

Many thanks in advance to anyone who can help shed some light on this

Meg