Unfortunately, once and upgrade or service has been accepted or chosen, it is impossible to go back. You will need to start a new return.

Thank you for choosing TurboTax.

That's not fair. We should be allowed to remove the upgrades. 

I selected I don't want to claim my child's tuition credit but it keeps asking me to enter all information. 

@mrhatkar Once the product has been chosen for an upgrade, it is regrettably not possible to downgrade. If you want to continue your return, you will need to start over in the version you prefer.