TurboTax does not pay any type of taxes for you. They only forward payment instructions with the return and the fed & state taxing authorities complete the transaction. Download the PDF of your tax return and look at the Filing Instructions for how you chose to pay the taxes owed.
[1] If you requested a direct debit from your
bank account, that information is sent with your tax return to the
IRS. They would then debit your account. Your bank statement proves direct debit
payment.
[2] If you chose to pay your taxes by check
then you would have printed the payment voucher and mailed the voucher with
your payment to the IRS. Your cancelled
check is proof of payment.
[3] If you chose to pay the taxes owed by
credit card, then your card statement would have the payee listed and serves as
proof of payment.
Unless you picked an alternate date the default payment date for a direct debit is the due date of the return which is April 15, 2019 for the 2018 tax year. You will get no formal receipt from TT since technically they don't make the payment; they only forward the debit instructions to the fed or state taxing authority. Your "receipt" will be on your bank or credit card statement. If you open the version of your return that includes all forms and worksheets, you should have the cover page for your Federal return. The cover sheet will have either your direct debit information (date to be withdrawn, account information and amount owed) or indicate to pay by check. Please follow the steps below to get the full download.
1. Login to https://myturbotax.intuit.com/ using the same username
2. Click on Taxes in the white banner at the top
3. Click on Download all forms and worksheets under the Some things you can do section below your 2018 statuses
Note : If you are using TurboTax Desktop (CD/Download product), you can find a copy of your return through the Print Center.
If you did not setup direct debit, you can pay the IRS directly at the website below.
If you did pick an alternate date then the payment is usually not initiated until the return is processed.
If you also owe the state ... read the state payment instructions carefully since most states cannot be paid from within the TT system and requires additional steps. https://ttlc.intuit.com/questions/1900884-what-are-my-options-for-getting-my-state-refund-or-for-paying-any-state-taxes-i-owe