$79.98 charge came from my bank account but was supposed to come from my refund?

I opted to have the $79.98 charge from using TurboTax Deluxe taken from my refund so that it would not have to come out of my bank account. I haven't received my refund yet, and TurboTax just charged me the amount out of my bank account. Why is this? Are they allowed to do this?