sir your answer seems very right. Thank you so much for your reply. I used following lines of code after inheriting into account.move

<?xml version="1.0" encoding="utf-8" ?>

<odoo>

<data>

<record id="view_move_form" model="ir.ui.view">

<field name="name">account.move.form</field>

<field name="model">account.move</field>

<field name="inherit_id" ref="account.view_move_form"/>

<field name="arch" type="xml">

<xpath expr="//notebook" position="after">

<div class="oe_chatter">

<field name="message_follower_ids" widget="mail_followers"/>

<field name="message_ids" widget="mail_thread" options='{"thread_level": 1}'/>

</div>

</xpath>

</field>

</record>

</data>

</odoo>