I'm using Kofi and Liberapay as donation platforms and Stripe as a payment processor, but like all of these platforms they say it's the responsibility of the user to make sure they are tax compliant.
But I cannot find any advice anywhere that covers the situation of a free online service which accepts donations.
@FediThing On the platforms I use, I had to fill out one of those 1099 tax forms.
You should do the same on Stripe: https://stripe.com/docs/connect/get-started-tax-reporting