get_cus_id=Product_Load[ID == request.ID];

get_cus = Customer_Master [ ID == get_cus_id.Customer_Name ];

finalmap=Map();

finalmap.put("customer_id", get_cus.Zoho_Customer_Id);

finalmap.put("Customer Name", get_cus.Customer_Name);

    finalmap.put("date", get_cus_id.Invoice_Date);

    finalmap.put("invoice_number", get_cus_id.Invoice_No);

    //Line Item

    //LIne Item List

    line_item_list = List();

    for each rec in get_cus_id.Enter_your_product_details

    {

proname = Product_Master [ ID == rec.Product_Name ].Product_Name;

        get_item_det  =  Product_Details  [ID == rec.Product_Name];

        line_items = map();

        line_items.put("item_id", get_item_det.Zoho_product_id);

        line_items.put("name", proname);

        line_items.put("rate", rec.Product_Bill_Amount);

        line_items.put("quantity", rec.Total_Quantity);

        line_item_list.add(line_items);

    }

    finalmap.put("line_items", line_item_list);

Authtoken = "123";

Organization_ID = "651494962";

response = postUrl(" https://books.zoho.com/api/v3/invoices?authtoken=" + Authtoken + "&organization_id=" + Organization_ID + "&JSONString=" + ((finalmap.toString()).toMap()), "");

// aaa = response.executeXPath("/root/invoice/invoice_number/text()");

//    get_cus_id.Invoice_No = aaa;

info "response is :" + response;