Market facilitator tax

Hi all. New seller here. I am being charged this Marketplace Facilitator tax on every sale and it’s killing margins.

UK registered company with VAT numbers in Netherlands and UK (both verified with Amazon)

I am shipping to Spain and Italy from my warehouse in Netherlands.

I have my ‘default shipping address’ in ‘general shipping settings’ set to my Netherlands warehouse in both my Spain and Italy marketplaces.

Under ‘vat calculator settings’ in ‘Account info’, I have:

my Netherlands warehouse under ‘confirm shipping address’
‘default country for VAT exclusive price’ as Netherlands
‘default product tax code’ as A_GEN_STANDARD

What I haven’t done here is clicked ‘Agree & Activate’. Should I do this or does it have no impact on the Market facilitator tax here?

Do I need to activate for Amazon to see I’m shipping from the EU to the EU?

Each of my listings in my inventory are set to ‘A_GEN_NOTAX’ for the Product Tax Code.

Can anyone enlighten me as to what I’m doing wrong?