To see what fees were added to your return:
1. Once logged in to your TurboTax account and on the Tax Home page, click Review/Edit or Pick up where you left off on any of the tax return topics.
2. When your tax return is open, click on Tax Tools on the left hand panel. You may need to scroll to the bottom to see.
3. Click on Tools.
4. Click on the blue box that says My Fees.
This will itemize what the $78 is for. It's possible you added on services such as Max or expert help.