How do I add tax to my receipt?

[steve2301]

In C# I have

               var othertaxrate = new otherTaxType
                {
                    localTaxAmount = Convert.ToDecimal(HttpContext.Current.Request["TotalTaxamount"]),
                    nationalTaxAmount = Convert.ToDecimal(HttpContext.Current.Request["TotalTaxamount"]),
                    alternateTaxAmount = Convert.ToDecimal(HttpContext.Current.Request["TotalTaxamount"]),
                    localTaxAmountSpecified = true,
                    nationalTaxAmountSpecified = true,
                    alternateTaxAmountSpecified = true,
                    vatTaxAmount = Convert.ToDecimal(HttpContext.Current.Request["TotalTaxamount"]),
                    vatTaxAmountSpecified = true,
                    vatTaxRate = Convert.ToDecimal(HttpContext.Current.Request["TotalTaxamount"]),
                    vatTaxRateSpecified = true
                };


//  and in transactionRequest I have  snippet


                    customer = customerProfile,
                    payment = paymentType,
                    billTo = billingAddress,
                    lineItems = lineItems_d,
                    tax = othertaxrate

The line      tax = othertaxrate 

gives me an error

Error CS0029
Cannot implicitly convert type
'AuthorizeNet.Api.Contracts.V1.otherTaxType'
to 'AuthorizeNet.Api.Contracts.V1.extendedAmountType'

How can I solve?

How can I show tax on my receipt?

Thanks,

Steve2301