There is no filing fee for either a federal or state tax return using the online editions.
There is a charge for the use of the state software which would be $54 if using any of the Live editions (except Basic).
Take a look at your actual charges for the online account and verify that you were charged for one of the Live editions. See this TurboTax support FAQ for checking your account fees - https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/review-fees-turbo...
The only reason for an up charge when amending a tax return is if you need to upgrade your account because your current account does not support the reason for amending. Such as using the Basic or Deluxe edition and adding investment income where you need the Premier edition. Or using the Basic, Deluxe or Premier edition and you need to amend for self-employment income and expenses using the Self-Employed edition.
Not knowing why the Tax Expert indicated you needed to upgrade Contact TurboTax support on Monday for assistance.
See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
