server/AyaNova/biz/PurchaseOrderBiz.cs

@@ -131,6 +131,7 @@ namespace AyaNova.Biz
 
             //Show PartRequest fields?
             po.DisplayPartRequest = false;
+            po.DisplayTaxes = false;
 
             foreach (PurchaseOrderItem item in po.Items)
             {
@@ -149,6 +150,7 @@ namespace AyaNova.Biz
                 {
                     tax = await ct.TaxCode.AsNoTracking().Where(x => x.Id == item.PurchaseTaxCodeId).SingleAsync();
                     item.DisplayTaxCode = tax.Name;
+                    po.DisplayTaxes = true;
                 }
 
                 //Calculate line totals

server/AyaNova/models/PurchaseOrder.cs

@@ -42,10 +42,12 @@ namespace AyaNova.Models
         [NotMapped, JsonIgnore]
         public AyaType AyaType { get => AyaType.PurchaseOrder; }
 
-		[NotMapped]
+        [NotMapped]
         public bool DisplayWarehouses { get; set; }
-		[NotMapped]
+        [NotMapped]
         public bool DisplayPartRequest { get; set; }
+        [NotMapped]
+        public bool DisplayTaxes { get; set; }
 
     }//eoc
 

server/AyaNova/util/Seeder.cs

@@ -1721,6 +1721,8 @@ namespace AyaNova.Util
 
                 List<long> partsAdded = new List<long>();
                 int partCount = Fake.Random.Int(1, 5);
+                //simulate some items without tax codes
+                bool addTaxCode = (Fake.Random.Number(1, 3) == 2);
                 for (int y = 0; y < partCount; y++)
                 {
                     long partId = 0;
@@ -1730,6 +1732,7 @@ namespace AyaNova.Util
                     } while (partsAdded.Contains(partId));
                     partsAdded.Add(partId);
                     var qty = Fake.Random.Int(1, 100);
+
                     o.Items.Add(new PurchaseOrderItem()
                     {
                         PartId = partId,
@@ -1739,7 +1742,7 @@ namespace AyaNova.Util
                         PurchaseOrderCost = 10,
                         ReceivedCost = 10,
                         ReceivedDate = o.ExpectedReceiveDate,
-                        PurchaseTaxCodeId = 3//sales and goods
+                        PurchaseTaxCodeId = addTaxCode ? 3 : null//sales and goods
                     });
                 }