They don't. See: https://filesprout.com/support/what-do-i-need.html
"If after talking with a professional you are responsible for paying sales tax for your items, you'll have to add this into your pricing manually."
If that link is to be believed, you also need to submit your taxes on a quarterly basis, not a yearly basis as filesprout mentions as well as keep track of and store your customers data for 10 years.
Also, on your link they say: >Do you take a % of my sales? No way jose :) That's your money.
Whereas the main page says: >No contracts or monthly fees, leave at anytime. We take 5% you keep 95%. Fair enough?
Which too me qualifies as taking a % of sales, 5 to be precise.
And my final complaint: grey text on a white background...
Doesn't matter, to a degree, the rules apply to anyone selling to Europeans regardless of where they are based. How and if non-compliance will be prosecuted is a more complicated matter.
Indeed. As far as I can tell, it's only been tested in a limited sense when there are relatively clear violations, such as drug markets, blatant piracy, or gambling. But extend that a bit further, and you get into the sort of murky territory where you're forced to blacklist entire countries because they have crazy people running them.