Just so everyone is aware, I recently found that the IRS has no idea how to modify a future-dated payment in their Direct Payment system. I've reached out to a supervisor there to escalate the matter. Someone in that organization must know how to cancel a future-dated payment. It is THEIR system. If they cannot help me, I have to fill out an ACH Stop Payment with my credit union and pray it works. If it doesn't, and the IRS takes both posted income tax payment amounts, I'm afraid I'll never see it again.
