Did you actually receive a DR-15?
See https://floridarevenue.com/forms_library/current/dr15.pdf
You need to collect sales tax in Florida for various business activities conducted within the state and it does not matter in which state your LLC is organized.
See https://floridarevenue.com/taxes/taxesfees/Pages/sales_tax.aspx
For reference:
https://floridarevenue.com/taxes/tutorial/dr15/story.html
