To upload a CSV file containing new contacts to Boma, click on Contacts tab in the panel menu.
Next, click on the CSV Import button and follow the onscreen instructions.
You can also download an example CSV file which contains the required field structure.
Once you've uploaded the CSV file successfully you can Tag the new contacts so you can find them in your contact database.
Further Reading:
Changing a contact's email address
How to add contact/s that have unsubscribed from your BOMA database
Wolters Kluwer iFirm - How to export contacts to import into BOMA
What is a tag and how do I use them in BOMA?
How do I add a Tag to my contacts?