The IRS may not even deduct the funds then because of them being so busy this time of year. As long as you filed your return or extension on or before July 15, 2020 and you selected July 15, 2020 (or earlier) as your payment date, you won't get penalized for late payment.
To verify the date that Federal funds will be withdrawn from your account, confirm that funds have been transferred, or cancel the transaction up to 48 hours before the date you designated the funds to be debited, call the IRS at 1 (888) 353-4537.
