Under Governor Jeb Bush, Floridians cumulatively saved about $19 billion in taxes. But in citing this number (which comes from Jeb’s Right to Rise PAC, not from his campaign), he’s including tax revenue saved as a result of actions from his state legislature and even from the end of the estate tax. That wasn’t a policy from Jeb, but rather a federal-level change pushed by his brother, then-President George W. Bush.
For these and several other reasons, Politifact labeled this statement from Jeb a half truth. You can read their dive into the claim here.