Calculating Total Tax on Quotes

Hi there,

The scenario is that we just have tax on quote and also we may not have it. I created a decimal field the has the percent of the tax that may be 0 or 9. I wrote a code to calculate a replace the total tax , but it doesn't work. What's the point.

        public string IntenalExcuter(IOrganizationService orgsrv, EntityReference quote)
        {

            Entity quoteEnt = orgsrv.Retrieve(quote.LogicalName, quote.Id, new ColumnSet("totallineitemamount","totaltax","new_taxpercent", "new_customtax"));
            string message = "";
            Entity updateEntity = new Entity(quote.LogicalName);
            updateEntity.Id = quote.Id;
            decimal totallineitemamount = quoteEnt.GetAttributeValue<Money>("totallineitemamount").Value;
            decimal taxpercent = quoteEnt.GetAttributeValue<decimal>("new_taxpercent") / 100;
            decimal amount = totallineitemamount * taxpercent ;
            updateEntity["new_customtax"] = new Money(amount);
            updateEntity["totaltax"] = new Money(amount);
            try
            {
                orgsrv.Update(updateEntity);
            }
            catch (Exception e)
            {

                message= e.Message;
            }

            return message;
        }

Best Regards

Sam