To edit the Place of Service you must having billing permissions. Below shows you how to change it on an invoice. Click here to see how to set it on a progress note.
Go to Clients > Search for Desired Client > Ledger
Find the desired Date of Service you need to change the Place of Service for. On that Invoice choose > Select an Action > View Details.
The Place of Service drop down is located to the right of the Date of Service.
After you have changed your Place of Service click Save on the invoice.