Once
you transmit your return you cannot change it or get it back.
You would have to wait until your return gets rejected or accepted.
If
rejected, you can make your changes or add information to your
return.
If
accepted, you would need to amend your return to correct or add
information to your return.
The
federal amend form is set to be available on 2/11/2016.
You will want to wait
until after your original payment or refund has cleared to submit amend forms,
so you don't cause a delay in your original tax return .
https://ttlc.intuit.com/replies/3288565