Nevermind. I answered my own question. I needed to get rid of “use” and format it like so:
function my_acf_load_field( $field ) {
$address = get_field('center_address', 342);
$field['default_value'] = $address;
return $field;
}
add_filter('acf/load_field/name=contact_person', 'my_acf_load_field');