@FediThing @feditips most probably you need to look into OSS https://vat-one-stop-shop.ec.europa.eu/index_en and have a talk with your local state revenue service. For example, in my country SRS has an option that a person signs up to pay VAT and pay OSS through them, then you do not need to sign up for OSS in other countries.
I do not know all the details, but that's what I have gathered from local SRS.

I am no professional tax-adviser, but I can support the claims made that you do not need to do anything in case of having a limited revenue.
In Germany there is a special rule which allows you (up to quite high revenue volumes actually) to be exempt from sales tax (at the 'price' of not being able to do a deduction of the sales tax on your expenses).

@feditips @FediThing

@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.

@FediThing I mean it prevents posts from being accessible to not-logged in users just trying to read a post. could be good or bad, depending on what you want

@FediThing I haven't tried it out myself but my understanding is that requests that don't contain an ActivityPub signature of sorts will be blocked.

Many fediverse clients will support that, not just Mastodon but it's true that you might find some exceptions, especially if they're older.

@FediThing It does begin to look like all the news articles saying “yeah nah he’ll never get out of *that* contract” were right