Exemptions are deductions you receive for yourself, your spouse (if applicable), and each person listed as a dependent on your return. 

You can edit your dependents under "Personal Info", and click "Edit" next to the person on the return if you would like to change their dependent status.

You can also change your own dependent status (click Edit next to your name under Personal Info) and select that someone can claim you on their tax return, if this applies in your case.