i want to add a tab (page) after Deliveries & Invoices tab and add fields into my new tab
<record model="ir.ui.view" id="purchase_order_form">
<field name="name">purchase.order.form</field>
<field name="model">purchase.order</field>
<field name="inherit_id" ref="purchase.purchase_order_form"/>
<field name="arch" type="xml">
<xpath expr="//page[@name='Deliveries & Invoices']" position="after">
<page string='Terms & Conditions'>
</page>
</xpath>
</field>
</record>
i tried above code and update custom module it says
Element '<xpath expr="//sheet/notebook/page[@name='Deliveries & Invoices']">' cannot be located in parent view
