Once the TurboTax account fees have been paid you cannot delete the state tax return.
You will have to contact TurboTax support for assistance with this problem. Use the key words Billing Issue
See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/turbotax-phone-number...
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
