Mass Deletion or Adding to Contact List within a Form

mik3

I manage a process that involves many people at the company. As people leave and join the company, I need to update the contact list, and we are at almost 3,000 employees. To have this be done manually isn't ideal. It would be great if you could update via CSV document through the manage form setup so contacts are updated with ease. Also, for deleting it would be great if there was a select all option for mass deletion for the current list of contacts