Hi @PatriciaS0627 ,
You can fill out as many or as few of the standard contact fields as you like. The only field we require for a contact to have filled out is email address, the rest are optional. If you wanted to include more fields than just the standard ones provided by Constant Contact, you can feel free to create additional custom fields.
As for your update profile form, you can edit the fields that appear on it however you'd like to.
... View more