@FediThing If you aren't registered for sales tax in your country, I don't see how anyone could pay you sales tax on a donation?

In the UK, if your turnover is £85k and above, you have to be VAT-registered and you have to collect VAT on every sale. I doubt you would need to be VAT-registered in the UK if you're based in, say, France, and are getting €200/year from people in the UK.

You aren't selling anything; these are donations.