Calculate tax for project invoice using x++ code Ax 2012

static void projectinvoiceTax(Args _args)
{
    ProjInvoiceJour         projInvoiceJour;
    TmpTaxWorkTrans         taxWorkTrans;
    ProjProposalTotals      ProjProposalTotals;
    TaxTable                taxTable;
    tax                     tax;
 
    projInvoiceJour     = ProjInvoiceJour::findRecId(5637146078); //projInvoiceJour.recid
    ProjProposalTotals  = new  ProjProposalTotals(ProjProposaljour::find( projInvoiceJour.ProposalId));
    ProjProposalTotals.calc();
    tax = ProjProposalTotals.tax();
   
    taxWorkTrans.setTmpData(tax.tmpTaxWorkTrans());
    while select taxWorkTrans
        join taxTable
        where taxTable.taxcode == taxWorkTrans.taxcode
    {
        info (strFmt('%1        %2     %3', taxWorkTrans.TaxCode, taxTable.showTaxValue(), taxWorkTrans.TaxAmount));

     
    }
 
}