Your only proof that you paid your tax due will be your own bank/credit card records. You did not pay "via TurboTax"-- you can indicate in the software that you want the tax due to be debited from your account by the IRS, but the IRS handles that--not TurboTax. If you entered a wrong account number etc. the IRS could not debit the account.
If your account shows that the payment was made then call the number on the IRS notice and sort it out with the IRS.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
