The tests went off a couple of weeks ago on their way to Ireland.
My tree is Stonehouse tree (Carol Biddiss)
My son's tree is Biddiss/Thornhill (David Biddiss)
David is now in contact with one of his dad's cousins. There are about 16 of them.
I need to find out how to manage his account.
Carol
It is an easy task if it his tree you want to manage, but it is one your Son needs to do to give you full access to his tree.
In Ancestry > Create and Manage Trees
Select the tree.
Tree Settings > Invitations
+ Invite People
From the Invite Link
From ROLE use Drop Down to select EDITOR.
Then select Copy Link.
The link is copied to the Clipboard and it needs pasting into an email.
Conversely if you both have an Ancestry account and want to consolidate into a single account then the easy way is to create a GEDCOM for each of the trees in the unwanted account and import each into the wanted Ancestry account.
If this is what you want to do, to keep say your account then your Son can still access your account using either your log in detail or by you following the process listed to invite him to view and Edit his tree.