First of all, you will not be able to have any control over her Name page. Any registered user may submit update requests to almost any data for any Name page (or Title page) in the system. The exceptions are for Company Details and Contact Data which can only be submitted from a Pro Account - but any Pro Account may submit for any Company or Contacts.
Claiming her page only allows you to upload or change photos and to create/maintain a separate Resume page; it gives you no added abilities with regard to the data on the main page; (You should also note that the photos and Resume page will disappear from display if the Pro Account used to claim the page is cancelled or allowed to lapse.)
To claim your daughter's Name page, start from her Pro Name page, and click on the red
Claim Your page button in the right margin. (Actually it doesn't matter which page you start from, but this is easiest.)
On the next page it asks :
Are you already in the IMDb? This actually refers to the person whose Name page is involved, i.e. your daughter - the 'your' in 'claim your page'.
Click on the text link
Claim your IMDb name pageOn the popup dialog box, enter your daughter's name as recorded in IMDb in place of the name it shows - presumably yours.
Check the radio button beside
I am not this person, but I will be managing their page on IMDb;
Click the enter button.
You should now be presented with a list of names including your daughter's.
Check the radio button beside your daughter's name
Click
Next.
The rest should be obvious (I don't dare continue further for fear I will claim someone's page).
Good luck.