Free text invoice using X++ in AX 2012

Today I'll show you to create Free text invoice using X++. I have done it in Indian localization
(after GST), you can skip those steps for other localizations.
I am creating free text invoice for price adjustment to be done on previously created Customer Invoice.

    CustInvoiceJour     custinvoicejour;
    CustInvoiceTrans    custinvoicetrans;    
    CustInvoiceTable    custInvoiceTable,custInvoiceTable1;
    CustInvoiceLine     custInvoiceLine,custInvoiceLine1;
    CustPostInvoice     custPostInvoice;
    CustTable       custtable;
    SalesLine       salesLine;
    SalesLine_IN    salesLinein;
    CustInvoiceLineTaxExtensionIN custInvoiceLineTaxExtensionIN;

    container   offsetDimensions;
    LineNum     lineNum;
    Query   q;
    QueryBuildDataSource    qbds;
    QueryRun    qr;

    q = new Query();

    qbds = q.addDataSource(tableNum(CustInvoiceJour));
    qbds.addRange(fieldNum(CustInvoiceJour, Invoiceaccount)).value("Cust1");
    qbds.addRange(fieldNum(CustInvoiceJour, InvoiceId)).value("TestInvoice1");
    qbds.addRange(fieldNum(CustInvoiceJour, InvoiceId)).value("TestInvoice2");

    qr = new QueryRun(q);

    while(qr.next())
    {
        custinvoicejour = qr.get(tableNum(CustInvoiceJour));
         //info(strFmt("%1, %2",custinvoicejour.InvoiceAccount, custinvoicejour.InvoiceDate));

        ttsBegin;

        custtable = CustTable::find(custinvoicejour.InvoiceAccount);
        custInvoiceTable.clear();
        custInvoiceTable.initFromCustTable(custtable);
        //custInvoiceTable.InvoiceDate = custinvoicejour.InvoiceDate;

        custInvoiceTable.insert();

        lineNum = 0;
        while select custinvoicetrans       
            where custinvoicetrans.InvoiceId == custinvoicejour.InvoiceId
            && custinvoicetrans.InvoiceDate == custinvoicejour.InvoiceDate
        {
            custInvoiceLine.clear();
            custInvoiceLine.initValue();
            
            //setup main account as required 
            offsetDimensions = ["999999","999999", 0, "", ""]; // you can set a Main Account with multiple financial dimensions

            custInvoiceLine.LedgerDimension = AxdDimensionUtil::getLedgerAccountId(offsetDimensions);
            custInvoiceLine.initFromCustInvoiceTable(custInvoiceTable);
            custInvoiceLine.ItemId = "001234"; //custom field     

           
            custInvoiceLine.Quantity = custinvoicetrans.Qty;
            custInvoiceLine.UnitPrice = 2.0 ;
            custInvoiceLine.modifiedField(fieldNum(CustInvoiceLine, UnitPrice));
            custInvoiceLine.Description = custinvoicetrans.itemName();

            //to get HSN code used in original invoice
            select salesLine
                where salesLine.SalesId == custinvoicetrans.SalesId
                && salesLine.ItemId == custinvoicetrans.ItemId;

            select salesLinein
                where salesLinein.SalesLine == salesLine.RecId;

            //Instead of HSNCode, you need to specify Taxgroup and Itemtaxgroup in case of other localizations
            custInvoiceLine.HSNCodeTable_IN = salesLinein.HSNCodeTable;

            custInvoiceLine.ParentRecId = custInvoiceTable.RecId;
            if(!lineNum)
            {
                lineNum = CustInvoiceLine::lastLineNum_W(custInvoiceLine.ParentRecId);
            }

            lineNum += 1;
            custInvoiceLine.LineNum = lineNum;
            custInvoiceLine.InvoiceTxt = custinvoicetrans.InvoiceId+"\n"+date2StrXpp(custinvoicetrans.InvoiceDate);//change it as per need

            custInvoiceLine.insert();
            
            //Specific to Indian localization, not required for other localizations
            custInvoiceLineTaxExtensionIN.CustInvoiceLine = custInvoiceLine.RecId;
            custInvoiceLineTaxExtensionIN.TaxInformation_IN = TaxInformation_IN::findDefaultbyLocation(DirPartyTable::find(CompanyInfo::findDataArea(curext()).PartyNumber).PrimaryAddressLocation).RecId;
            custInvoiceLineTaxExtensionIN.initValue();
            custInvoiceLineTaxExtensionIN.insert();

        }

        //Post free text invoice
        if(lineNum)
        {
            Select custInvoiceTable1 where custInvoiceTable1.RecId == custInvoiceTable.RecId;

            custPostInvoice = new CustPostInvoice(custInvoiceTable1);
            custPostInvoice.run();

            ttsCommit;

        }
        else
        {
            ttsAbort;
        }

    }
}

This is it. Share your ideas and thoughts if any.