diff --git a/Library/Adjustment.cs b/Library/Adjustment.cs
index fa63a954..04ddaf75 100644
--- a/Library/Adjustment.cs
+++ b/Library/Adjustment.cs
@@ -62,6 +62,8 @@ public enum RevenueSchedule : short
         public string TaxType { get; private set; }
         public decimal? TaxRate { get; private set; }
         public string TaxRegion { get; private set; }
+        public string OriginTaxAddressSource { get; set; }
+        public string DestinationTaxAddressSource { get; set; }
 
         public AdjustmentState State { get; protected set; }
 
@@ -284,6 +286,14 @@ internal override void ReadXml(XmlTextReader reader)
                         TaxRegion = reader.ReadElementContentAsString();
                         break;
 
+                    case "origin_tax_address_source":
+                        OriginTaxAddressSource = reader.ReadElementContentAsString();
+                        break;
+
+                    case "destination_tax_address_source":
+                        DestinationTaxAddressSource = reader.ReadElementContentAsString();
+                        break;
+
                     case "credit_reason_code":
                         CreditReasonCode = reader.ReadElementContentAsString();
                         break;
@@ -396,6 +406,10 @@ internal void WriteXml(XmlTextWriter xmlWriter, bool embedded = false)
                 xmlWriter.WriteElementString("end_date", EndDate.Value.ToString("s"));
             if (Origin != null)
                 xmlWriter.WriteElementString("origin", Origin);
+            if (OriginTaxAddressSource != null)
+                xmlWriter.WriteElementString("origin_tax_address_source", OriginTaxAddressSource);
+            if (DestinationTaxAddressSource != null)
+                xmlWriter.WriteElementString("destination_tax_address_source", DestinationTaxAddressSource);
             xmlWriter.WriteEndElement(); // End: adjustment
         }
 
diff --git a/Library/BusinessEntity.cs b/Library/BusinessEntity.cs
index 20ce9983..66074ca0 100644
--- a/Library/BusinessEntity.cs
+++ b/Library/BusinessEntity.cs
@@ -15,6 +15,9 @@ public class BusinessEntity : RecurlyEntity
         public string Name { get; set; }
         public InvoiceDisplayAddress InvoiceDisplayAddress { get; set; }
         public TaxAddress TaxAddress { get; set; }
+        public string OriginTaxAddressSource { get; set; }
+        public string DestinationTaxAddressSource { get; set; }
+
         public string DefaultVatNumber { get; set; }
         public string DefaultRegistrationNumber { get; set; }
         public string DefaultLiabilityGlAccountId { get; private set; }
@@ -74,6 +77,12 @@ internal override void ReadXml(XmlTextReader reader)
                     case "tax_address":
                         TaxAddress = new TaxAddress(reader);
                         break;
+                    case "origin_tax_address_source":
+                        OriginTaxAddressSource = reader.ReadElementContentAsString();
+                        break;
+                    case "destination_tax_address_source":
+                        DestinationTaxAddressSource = reader.ReadElementContentAsString();
+                        break;
                     case "subscriber_location_countries":
                         while (reader.Read())
                         {
diff --git a/Test/AdjustmentTest.cs b/Test/AdjustmentTest.cs
index fe0f1e71..48d7052b 100644
--- a/Test/AdjustmentTest.cs
+++ b/Test/AdjustmentTest.cs
@@ -48,6 +48,8 @@ public void CreateAdjustmentWithProperties()
             adjustment.Quantity = quantity;
             adjustment.AccountingCode = accountingCode;
             adjustment.UnitAmountInCents = unitAmountInCents;
+            adjustment.OriginTaxAddressSource = "origin";
+            adjustment.DestinationTaxAddressSource = "destination";
 
             adjustment.Create();
 
@@ -58,6 +60,8 @@ public void CreateAdjustmentWithProperties()
             Assert.Equal(quantity, adjustment.Quantity);
             Assert.Equal(accountingCode, adjustment.AccountingCode);
             Assert.Equal(unitAmountInCents, adjustment.UnitAmountInCents);
+            Assert.Equal("origin", adjustment.OriginTaxAddressSource);
+            Assert.Equal("destination", adjustment.DestinationTaxAddressSource);
         }
 
         [RecurlyFact(TestEnvironment.Type.Integration)]
@@ -216,6 +220,8 @@ public void AdjustmentGet()
             var fromService = Adjustments.Get(adjustment.Uuid);
 
             fromService.Uuid.Should().NotBeNull();
+            fromService.OriginTaxAddressSource.Should().Be("origin");
+            fromService.DestinationTaxAddressSource.Should().Be("destination");
         }
 
         [RecurlyFact(TestEnvironment.Type.Integration)]
diff --git a/Test/BusinessEntityTest.cs b/Test/BusinessEntityTest.cs
index 28880b94..28ea47a8 100644
--- a/Test/BusinessEntityTest.cs
+++ b/Test/BusinessEntityTest.cs
@@ -18,6 +18,8 @@ public void LookupBusinessEntity()
             businessEntity.InvoiceDisplayAddress.Country.Should().Be("US");
             businessEntity.TaxAddress.Country.Should().Be("US");
             businessEntity.GetInvoices().Should().BeOfType<InvoiceList>();
+            businessEntity.OriginTaxAddressSource.Should().Be("origin");
+            businessEntity.DestinationTaxAddressSource.Should().Be("destination");
         }
 
         [RecurlyFact(TestEnvironment.Type.Unit)]