diff --git a/cmd/cart/checkout_builder.go b/cmd/cart/checkout_builder.go
index 3e4c48a..226ed3c 100644
--- a/cmd/cart/checkout_builder.go
+++ b/cmd/cart/checkout_builder.go
@@ -13,12 +13,13 @@ import (
 // Klarna CheckoutOrder from a CartGrain snapshot. It deliberately excludes
 // any Klarna-specific response fields (HTML snippet, client token, etc.).
 type CheckoutMeta struct {
-	Terms        string
-	Checkout     string
-	Confirmation string
-	Country      string
-	Currency     string // optional override (defaults to "SEK" if empty)
-	Locale       string // optional override (defaults to "sv-se" if empty)
+	SiteUrl string
+	// Terms        string
+	// Checkout     string
+	// Confirmation string
+	Country  string
+	Currency string // optional override (defaults to "SEK" if empty)
+	Locale   string // optional override (defaults to "sv-se" if empty)
 }
 
 // BuildCheckoutOrderPayload converts the current cart grain + meta information
@@ -104,9 +105,9 @@ func BuildCheckoutOrderPayload(grain *cart.CartGrain, meta *CheckoutMeta) ([]byt
 		OrderLines:         lines,
 		MerchantReference1: grain.Id.String(),
 		MerchantURLS: &CheckoutMerchantURLS{
-			Terms:        meta.Terms,
-			Checkout:     meta.Checkout,
-			Confirmation: meta.Confirmation,
+			Terms:        fmt.Sprintf("%s/terms", meta.SiteUrl),
+			Checkout:     fmt.Sprintf("%s/checkout?order_id={checkout.order.id}", meta.SiteUrl),
+			Confirmation: fmt.Sprintf("%s/confirmation/{checkout.order.id}", meta.SiteUrl),
 			Notification: "https://cart.k6n.net/notification",
 			Validation:   "https://cart.k6n.net/validate",
 			Push:         "https://cart.k6n.net/push?order_id={checkout.order.id}",
@@ -149,6 +150,8 @@ func BuildAdyenCheckoutSession(grain *cart.CartGrain, meta *CheckoutMeta) (*chec
 			Quantity:           common.PtrInt64(int64(it.Quantity)),
 			AmountIncludingTax: common.PtrInt64(it.TotalPrice.IncVat),
 			Description:        common.PtrString(it.Meta.Name),
+			AmountExcludingTax: common.PtrInt64(it.TotalPrice.ValueExVat()),
+			TaxPercentage:      common.PtrInt64(int64(it.Tax)),
 		})
 	}
 
@@ -161,6 +164,8 @@ func BuildAdyenCheckoutSession(grain *cart.CartGrain, meta *CheckoutMeta) (*chec
 			Quantity:           common.PtrInt64(1),
 			AmountIncludingTax: common.PtrInt64(d.Price.IncVat),
 			Description:        common.PtrString("Delivery"),
+			AmountExcludingTax: common.PtrInt64(d.Price.ValueExVat()),
+			TaxPercentage:      common.PtrInt64(25),
 		})
 	}
 
@@ -173,7 +178,7 @@ func BuildAdyenCheckoutSession(grain *cart.CartGrain, meta *CheckoutMeta) (*chec
 		CountryCode:     common.PtrString(country),
 		MerchantAccount: "ElgigantenECOM",
 		Channel:         common.PtrString("Web"),
-		ReturnUrl:       meta.Checkout,
+		ReturnUrl:       fmt.Sprintf("%s/adyen-return", meta.SiteUrl),
 		LineItems:       lineItems,
 	}, nil
 
diff --git a/cmd/cart/pool-server.go b/cmd/cart/pool-server.go
index 37ffa7c..dd44355 100644
--- a/cmd/cart/pool-server.go
+++ b/cmd/cart/pool-server.go
@@ -370,12 +370,10 @@ func (s *PoolServer) CreateOrUpdateCheckout(r *http.Request, id cart.CartId) (*C
 	host := getOriginalHost(r)
 	country := getCountryFromHost(host)
 	meta := &CheckoutMeta{
-		Terms:        fmt.Sprintf("https://%s/terms", host),
-		Checkout:     fmt.Sprintf("https://%s/checkout?order_id={checkout.order.id}", host),
-		Confirmation: fmt.Sprintf("https://%s/confirmation/{checkout.order.id}", host),
-		Country:      country,
-		Currency:     getCurrency(country),
-		Locale:       getLocale(country),
+		SiteUrl:  fmt.Sprintf("https://%s", host),
+		Country:  country,
+		Currency: getCurrency(country),
+		Locale:   getLocale(country),
 	}
 
 	// Get current grain state (may be local or remote)
@@ -731,12 +729,10 @@ func (s *PoolServer) AdyenSessionHandler(w http.ResponseWriter, r *http.Request,
 	host := getOriginalHost(r)
 	country := getCountryFromHost(host)
 	meta := &CheckoutMeta{
-		Terms:        fmt.Sprintf("https://%s/terms", host),
-		Checkout:     fmt.Sprintf("https://%s/checkout?order_id={checkout.order.id}", host),
-		Confirmation: fmt.Sprintf("https://%s/confirmation/{checkout.order.id}", host),
-		Country:      country,
-		Currency:     getCurrency(country),
-		Locale:       getLocale(country),
+		SiteUrl:  fmt.Sprintf("https://%s", host),
+		Country:  country,
+		Currency: getCurrency(country),
+		Locale:   getLocale(country),
 	}
 	sessionData, err := BuildAdyenCheckoutSession(grain, meta)
 	if err != nil {