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Direct to you You get paid immediately each time a purchase is made. You must link to payment providers you wish to support.

Collected by itch.io, paid later itch.io collects your payments, you request to be paid in bulk later. itch.io’s default payment providers are used.

These are the two ways to collect the games, in both ways do you have to fill out a tax interview?

I don't know, but in Direct to you mode you have to pay VAT, and basically act like a business.