You can check the payment date that you specified by looking at your
Filing Instructions document (or Electronic Filing Instructions
document), which prints out as part of your tax return paperwork. Your
chosen date will display at the top of the page, in the Balance Due/Refund section.
Another way to see how you paid your taxes is to login your TurboTax tax timeline and go through the File section again until you reach the screen that explains the payment methods and what you chose.
you set-up a payment using direct debit for your income tax payment and
you did not specify a payment date for the withdrawal, TurboTax's
default payment date will be used (the last day of tax season = April
18th this year).
You can also call IRS e-file Payment Services anytime at 1-888-353-4537 to verify your direct debit.
Also see the following for further information.
Hope this was helpful!