You will have to cancel the payment and then pay the federal taxes owed on the IRS payment website on or before July 15, 2020.
IRS website for information on canceling a direct debit payment -https://www.irs.gov/payments/pay-taxes-by-electronic-funds-withdrawal
Go to this IRS payment website and choose Direct Pay - https://www.irs.gov/payments
I scheduled my 2019 payment for April 12, 2020. Covid-19 legislation allowed me
to postpone payment until July 15.
To reschedule is a two step process.
I first needed to cancel the April 12 payment.
I called the IRS 888-353-4537 (number turbo tax provided/listed.
I provided 3 items 1) my SS#, 2) my bank checking account number,
and 3) the amount of the payment.
Took about 2 minutes.
I'll call back in July to make my payment.