Twitch affiliate?

I need help filling out an application at twitch affilate. I should state a few things but don't know exactly what the application is called W-8IMY

If you're non-US then you might also need to fill out a W-8 or IRS form 8233 to get verified. This form helps you avoid an automatic 30% tax withholding on income earned from US companies. The IRS instructions are
https://www.irs.gov/...iw8ben.pdf and
https://www.purdue.edu/business/payroll/taxes/pdf/form8233instructions.pdf for the form 8233. It takes a couple of extra steps for you since Twitch is an American company. It will ask for most of the same information you'll need for the tax interview anyways.

Source: http://streamersquare.com/twitch-affiliate-tax-form/

Of course, you have to pay taxes in Germany.

One reason why I rejected Affilate when I was offered it. Far too annoying xD

what do I have to select and check here?