The user “John Smith” has been registered; go to the “User Profile” tab to view the user’s details.
reads more naturally to me than
The “John Smith” user has been registered; go to the tab “User Profile” to view the user’s details.
but I’m not sure why. In particular, it seems wrong for John Smith to go before the word user, whereas User Profile can go either before or after the word tab (although it seems to flow a little better when it’s before).
What rules of grammar apply here?