You can call the IRS e-file Payment Services 24/7 at 1-888-353-4537 to ask about or cancel your payment. But you'll need to wait 7 to 10 days after your return is accepted before calling. You must call to make a payment cancelation request at least two business days before the scheduled payment date.
If you cancel your direct debit payment, you'll need to choose a
different way to pay your taxes.