I received an invitation yesterday to join Twitch's affiliate program. In the tax interview you have to enter a "tax identification number". Since I already had the donation link in my stream, I registered a trade and thus also received the tax number from the tax office. I entered my business tax number in the tax interview. Was that wrong now? It's all about the tax number. Or do I have to enter my tax ID there. If so, I would have to edit the form. Does it work? Here I read that I should have entered my tax ID there.
https://www.affiliate-marketing-tipps.de/affiliate-marketing/hilfe-zum-amazon-steuerfragebogen-fuer-affiliates/1002546/
The tax ID has 11 digits and is valid from birth to 20 years after death. The tax number can Change every year. THE tax ID was communicated once, otherwise ask the tax office.