diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/converter/FetchedOrder.kt b/src/main/kotlin/com/ecwid/apiclient/v3/converter/FetchedOrder.kt
index 92ca179d..12706c99 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/converter/FetchedOrder.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/converter/FetchedOrder.kt
@@ -213,6 +213,7 @@ fun FetchedOrder.OrderItemTax.toUpdated(): UpdatedOrder.OrderItemTax {
 		taxOnHandlingFee = taxOnHandlingFee,
 		includeInPrice = includeInPrice,
 		taxType = taxType,
+		sourceTaxRateType = sourceTaxRateType,
 	)
 }
 
diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/cart/result/CalculateOrderDetailsResult.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/cart/result/CalculateOrderDetailsResult.kt
index 6b933bc1..2c76245c 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/cart/result/CalculateOrderDetailsResult.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/cart/result/CalculateOrderDetailsResult.kt
@@ -192,6 +192,7 @@ data class CalculateOrderDetailsResult(
 		val taxOnDiscountedSubtotal: Double? = null,
 		val taxOnShipping: Double? = null,
 		val taxOnHandlingFee: Double? = null,
+		val sourceTaxRateType: TaxRateType? = null,
 	) : BaseOrderTax
 
 	data class OrderItemProductFile(
diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/enums/TaxRateType.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/enums/TaxRateType.kt
new file mode 100644
index 00000000..e63fd98a
--- /dev/null
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/enums/TaxRateType.kt
@@ -0,0 +1,8 @@
+package com.ecwid.apiclient.v3.dto.order.enums
+
+enum class TaxRateType {
+	AUTO,
+	MANUAL,
+	CUSTOM,
+	LEGACY
+}
diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt
index 9013f919..82358cc5 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt
@@ -279,6 +279,7 @@ data class UpdatedOrder(
 		val taxOnShipping: Double? = null,
 		val taxOnHandlingFee: Double? = null,
 		val includeInPrice: Boolean? = null,
+		val sourceTaxRateType: TaxRateType? = null,
 		val taxType: OrderItemTaxType? = null,
 	) : BaseOrderTax
 
diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt
index 9fb1fbc9..9997bca4 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt
@@ -268,16 +268,9 @@ data class FetchedOrder(
 		val taxOnHandlingFee: Double? = null,
 		override val includeInPrice: Boolean? = null,
 		val sourceTaxRateId: Int? = null,
-		val sourceTaxRateType: RateType? = null,
+		val sourceTaxRateType: TaxRateType? = null,
 		val taxType: OrderItemTaxType? = null,
-	) : ExtendedOrderTax {
-		enum class RateType {
-			AUTO,
-			MANUAL,
-			CUSTOM,
-			LEGACY
-		}
-	}
+	) : ExtendedOrderTax
 
 
 	data class HandlingFeeTax(
diff --git a/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/CalculateOrderDetailsResultRules.kt b/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/CalculateOrderDetailsResultRules.kt
index 68de0ddc..ccb648b9 100644
--- a/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/CalculateOrderDetailsResultRules.kt
+++ b/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/CalculateOrderDetailsResultRules.kt
@@ -98,6 +98,7 @@ val calculateOrderDetailsResultNullablePropertyRules: List<NullablePropertyRule<
 	IgnoreNullable(CalculateOrderDetailsResult.OrderItemTax::taxOnDiscountedSubtotal),
 	IgnoreNullable(CalculateOrderDetailsResult.OrderItemTax::taxOnShipping),
 	AllowNullable(CalculateOrderDetailsResult.OrderItemTax::taxOnHandlingFee),
+	AllowNullable(CalculateOrderDetailsResult.OrderItemTax::sourceTaxRateType),
 	IgnoreNullable(CalculateOrderDetailsResult.OrderItemTax::total),
 	IgnoreNullable(CalculateOrderDetailsResult.OrderItemTax::value),
 	IgnoreNullable(CalculateOrderDetailsResult.PersonInfo::city),