How do you know that the error was due to TurboTax? What happened? No one else can see your tax return or your account so we have no way to know what went wrong for you.
TurboTax guarantees that the calculations will be done correctly----but TurboTax cannot know if you enter some income incorrectly or leave any income out, etc when you prepare the return. Nor does TurboTax know if you owed child support or back taxes that could cause the IRS to reduce your refund.
https://turbotax.intuit.com/corp/guarantees/
If you think you have a claim under the accuracy guarantee:
https://ttlc.intuit.com/community/choosing-a-product/help/what-documents-do-i-need-to-submit-a-claim...
**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.**