https://www.irs.gov/payments/pay-taxes-by-electr[product key removed]rawal#:~:text=Call%20IRS%20e%2D...
- Call IRS e-file Payment Services 24/7 at [phone number removed] to inquire 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.
If you don't have a payment setup already, you can request a installment plan with the following link.
https://www.irs.gov/payments/online-payment-agreement-application
