Scripts to transition database to new version.

Changed inventory and product entities to split Vat and Service Tax and IsScTaxable.
Added MessageBox on startup to inform about Debug Mode.
Updated ProductForm for the change.
Work still needs to be done on Thermal Printing where the hack for VAT on Food and VAT on Liqour is still there.
Now No Service Tax on Delivery Works as promised.

Tanshu.Accounts.Contracts/Data Contracts Display/BillInventoryBO.cs

@@ -27,12 +27,27 @@ namespace Tanshu.Accounts.Contracts
             }
         }
 
-        public decimal Tax { get; set; }
-        public decimal TaxAmount
+        public bool IsScTaxable { get; set; }
+
+        public decimal ServiceTax { get; set; }
+        public decimal ServiceTaxAmount
         {
             get
             {
-                return Quantity * Price * (1 - _discount) * (1 + ServiceCharge) * Tax;
+                if (IsScTaxable)
+                    return Quantity * Price * (1 - Discount) * (1 + ServiceCharge) * ServiceTax;
+                return Quantity * Price * (1 - Discount) * ServiceTax;
+            }
+        }
+
+        public decimal Vat { get; set; }
+        public decimal VatAmount
+        {
+            get
+            {
+                if (IsScTaxable)
+                    return Quantity * Price * (1 - Discount) * (1 + ServiceCharge) * Vat;
+                return Quantity * Price * (1 - Discount) * Vat;
             }
         }
 
@@ -41,7 +56,7 @@ namespace Tanshu.Accounts.Contracts
         {
             get
             {
-                return Quantity * Price * (1 - _discount) * ServiceCharge;
+                return Quantity * Price * (1 - Discount) * ServiceCharge;
             }
         }
 
@@ -49,7 +64,7 @@ namespace Tanshu.Accounts.Contracts
         {
             get
             {
-                return Quantity * Price * _discount;
+                return Quantity * Price * Discount;
             }
         }
 
@@ -57,7 +72,7 @@ namespace Tanshu.Accounts.Contracts
         {
             get
             {
-                return Quantity * Price * (1 - _discount);
+                return Quantity * Price * (1 - Discount);
             }
         }
 
@@ -67,7 +82,9 @@ namespace Tanshu.Accounts.Contracts
         {
             get
             {
-                return Price * Quantity * (1 - _discount) * (1 + ServiceCharge) * (1 + Tax);
+                if (IsScTaxable)
+                    return Quantity * Price * (1 - Discount) * (1 + ServiceCharge) * (1 + ServiceTax + Vat);
+                return Quantity * Price * (1 - Discount) * (1 + ServiceCharge + ServiceTax + Vat);
             }
         }
 
@@ -107,7 +124,9 @@ namespace Tanshu.Accounts.Contracts
                 Quantity = 1;
                 Price = product.Price;
                 FullPrice = product.FullPrice;
-                Tax = product.Tax.Rate;
+                IsScTaxable = product.IsScTaxable;
+                ServiceTax = product.ServiceTax.Rate;
+                Vat = product.Vat.Rate;
                 ServiceCharge = product.ServiceCharge;
                 Discount = 0;
                 Printed = false;
@@ -123,7 +142,7 @@ namespace Tanshu.Accounts.Contracts
             FullPrice = 0;
             Printed = true;
             Quantity = 0;
-            Tax = -1;
+            Vat = -1;
             ServiceCharge = 0;
         }
 
@@ -137,7 +156,7 @@ namespace Tanshu.Accounts.Contracts
             FullPrice = 0;
             Printed = true;
             Quantity = 0;
-            Tax = -1;
+            Vat = -1;
             ServiceCharge = 0;
         }