They do not send you confirmation of something they will do in the future. You just have to watch your own account for the transaction.
If you need to change the date:
TO CANCEL A TAX PAYMENT YOU SCHEDULED
If your return was accepted, you cannot change your payment method or payment date. The only thing you can do is cancel the payment and then pay by a different method on your own.
- Call IRS e-file Payment Services 24/7 at 1-888-353-4537 to ask about or cancel your payment, but please wait 7 to 10 days after your return was accepted before calling.
- Cancellation requests must be received no later than 11:59 p.m. ET two business days prior to the scheduled payment date.