Solved

How can I change how I pay taxes due. I want to use a credit card rather than have it directly debited from my checking account on 7/15/2020?

For clarification, I already submitted my 2019 return, but the still IRS hasn't debited my account.

Best answer by DoninGA

You will need to cancel the payment for the federal taxes owed and then use the IRS website for a credit card payment.

Once your return is accepted, information pertaining to your payment, such as account information, payment date, or amount, cannot be changed. If changes are needed, the only option is to cancel the payment and choose another payment method.
Call IRS e-file Payment Services 24/7 at 1-888-353-4537 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.

Employee

You will need to cancel the payment for the federal taxes owed and then use the IRS website for a credit card payment.

Once your return is accepted, information pertaining to your payment, such as account information, payment date, or amount, cannot be changed. If changes are needed, the only option is to cancel the payment and choose another payment method.
Call IRS e-file Payment Services 24/7 at 1-888-353-4537 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.