Select the clients from your home base.

Go to file top left then select print for printing options including Labels.

You can print mailing labels  File > Print  > Print labels

The Homebase drop down menu has an option to Export Contacts to CSV, but I think that just exports the list thats showing in Homebase, you'd have to create a custom HB view with only the info you want included, like client name, address then export that HB view.