Confused about how/why/when Turbo Tax charges for filing tax return

I was not prompted to elect how to pay the $99 fee to file for "free", and I did NOT authorize anything to be deducted from my refund. It said the federal cost $99 and the state was $0. Then it said my total was $0 and never confirmed how or when I'll be charged for the free filing. I've also received a confirmation email stating that there is a $99 fee for the free filing, but that email, also, does not say how I'm being charged or when I'll need to pay.

It's sketchy enough that Turbo Tax advertises as a free service and then charges literally everyone to file taxes. Next year, I'll be filing with a different company. But for now, how do I pay these mo-fo's?