Pay what bill?
You pay the TurboTax fees with a credit card (or have it paid form your refund which is a very expensive way to pay - even a prepaid CC is better).
You pay your Federal or state tax directly to the IRS or state with a check, or online payment at the IRS or state payment sites.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**