My daughter is transferring unused tuition to me. I have entered her net income and I don't get the tuition transfer. Does this depend on how much income she made?

No. The tuition credit is non-refundable, as is the transfer. This means you don’t get the credit if you have no taxes owing. So, if you are already getting a refund, you won’t be able to use any of the tuition your daughter is transferring, which is why it looks like nothing is being transferred.