You can set up several Locations - that will be used in your Sample Requests.
You go to Admin - General Settings and select Location.
Just click on the "Add location" to add a new one.
Here you can type in the correct address.
You can select which one of your addresses you want to be the default Location - you can only have one default location.
And you have to select one of them.
Remember to click on the Save button.
The default Location will then always be listed as the Location on all your Sample Requests - unless of course, you select one of the other addresses.
DELETING A LOCATION
If you have a Location that you don't need anymore - you can just delete it.
Simply mouse over the Location row and click the delete icon to remove it.