Get the values from ProjProposalTotal forms in AX 2012

static void Job83(Args _args)
{
  ProjProposalTotals      ProjProposalTotals;
    container               taxCal;
    AmountCur               taxAmount;
        ProjProposalJour projProposalJour = ProjProposalJour::find(‘PROP-0019’);

        ProjProposalTotals  = new  ProjProposalTotals(projProposalJour);
        ProjProposalTotals.calc();
taxCal = ProjProposalTotals::displayFieldsServer(projProposalJour.RecId);
        taxAmount = conPeek(taxCal, ProjProposalTotals::posSumTax());
   
        InvoiceAmount  = projProposalJour.InvoiceAmount – taxAmount;
        TaxAmount       = taxAmount;
        CurrencyCode   = projProposalJour.CurrencyId;
        Amountstr   = Global::numeralsToTxt_UAE(projProposalJour.InvoiceAmount);
}

Regards,