My college daughter has filed and did not put someone else can claim her as a dependent. On 1040X to amend it there is no box to check someone else can claim her?

When preparing the amendment, follow these steps to edit:

1. Sign into your TurboTax account
2. Click on My Info in the left black navigation pane.
3. Click Edit 
4. Check the box that says someone can claim me as a dependent.