Well if I owed the IRS I would certainly remember how I choose to pay the balance due ... not sure why you would expect a DIY program to remind you of the payment that you set up yourself.
Even I as a tax professional don't call any of my clients to remind them of what I already explained to them when they filed. At the time of filing I stressed how/why the payment was to be made along with the paper confirmation of the debit and that is more than I legally need to do.
