account-financial-tools/account_balance_line/views/account_move_line_view.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record model="ir.ui.view" id="account_move_line_balance_tree">
        <field name="model">account.move.line</field>
        <field name="inherit_id" ref="account.view_move_line_tree" />
        <field name="arch" type="xml">
            <field name="credit" position="after">
                <field name="balance" sum="Total Balance" optional="show" />
            </field>
        </field>
    </record>
    <record model="ir.ui.view" id="account_move_line_balance_tree_grouped">
        <field name="model">account.move.line</field>
        <field name="inherit_id" ref="account.view_move_line_tree_grouped" />
        <field name="arch" type="xml">
            <field name="balance" position="attributes">
                <attribute name="optional">show</attribute>
            </field>
        </field>
    </record>
    <record model="ir.ui.view" id="account_move_line_balance_audit_tree">
        <field name="model">account.move.line</field>
        <field name="inherit_id" ref="account.view_move_line_tax_audit_tree" />
        <field name="priority">99</field>
        <field name="arch" type="xml">
            <field name="balance" position="replace" optional="show" />
        </field>
    </record>
</odoo>