The news explaining what it does and why it was made: https://www.sun-sentinel.com/business/fl-bz-florida-online-sales-tax-law-2021042...
So this means everyone living in the state of FL will get tax more than normal. This is an example:
$10
normal tax: $0.50
6% online sale tax for FL people: $1.60
fees: $0.20
Total: $12.30
FAQ
How will this work for developers?
itch.io will have to tax people living in fl, if you are a developer you wont get tax for getting payment because this law is only for fl customers paying for software/game/items
Does itch.io earn less than $100,000 a year to be exempt?
I currently do not know the answer to that. I'm going to wait for a reply and post it here.
What if I am from FL and someone in FL buys in itch.io store?
That is the huge evil of the law, even though FL residents sells through other FL residents, you will still get tax because the host/site is not currently in FL state. The only way to avoid the tax is if the company or hosting of the site is in FL land. This means no not even using free online sites will help you avoid getting tax. No you can't expect to buy or build a website/domain to avoid tax.
You will need the server and the website to be in FL state to avoid taxes to FL residents.
This is for only FL?
No this is also for Missouri and Kansas
https://www.kansascity.com/news/politics-government/article251414933.html
Kansas - Note Kansas is currently fighting on what to do with their tax permit laws so expect changes in the following days
https://www.avalara.com/vatlive/en/vat-news/kansas-imposes-sales-tax-registratio...