Get tax amount through x++

static void TIDgetTax(Args _args)
{
    TaxAmount           tax;
    CustInvoiceTrans    CustInvoiceTrans;
    ;

    CustInvoiceTrans =  CustInvoiceTrans::findRecId(5637155209);
    tax = Tax::calcTaxAmount(CustInvoiceTrans.TaxGroup, CustInvoiceTrans.TaxItemGroup, CustInvoiceTrans.InvoiceDate,
                            CustInvoiceTrans.CurrencyCode, CustInvoiceTrans.LineAmount, TaxModuleType::FreeTxtInvoice);

    info(strfmt('%1', tax));
}