admins can set tax rates in shopify admin panel https://SHOP.myshopify.com/admin/settings/taxes/* or ... they can add "Tax override" for specific collection, but this action didn't check ShopID! so we can add any collection id, and it will be add to our shop
this also will works for "Hidden" collections on any shop!
done! tax rate will be add to shop, and you can find collection name right in "Tax overrides" table!
Another way is send this request directly:
authenticity_token= TOKEN tax_override[is_shipping]=false tax_override[collection_id]= collection_id tax_override[tax_override_regions_attributes][zone]=state::TX tax_override[tax_override_regions_attributes][rate]=50