See this TurboTax support FAQ for deleting the state return when using the online editions - https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/delete-state-return-turbotax...
See this TurboTax support FAQ for deleting a state return using the desktop CD/Download editions for Windows - https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/clear-state-return-turbotax-...
Once you complete Federal Review click on File to only e-file the federal return after the state tax returns have been removed.
