"Says mine is ready to be mailed. "
Florida does not levy an individual income tax so there is nothing you need to mail to the state.
The Florida return is for owners of Florida-located businesses and rental real estate. If this does not apply to your tax situation, choose Skip State in the State Taxes section.
If you proceeded past the warning screens and have not paid for the return, you can delete it.
https://ttlc.intuit.com/replies/3301384
If you were actually charged for the return, contact Customer Support.
https://ttlc.intuit.com/replies/5566005