l10n_it_fatturapa_pec/views/company_view.xml
<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>
<record id="view_account_config_settings_ftpa_pec" model="ir.ui.view">
<field name="name">view_account_config_settings_ftpa_pec</field>
<field name="model">account.config.settings</field>
<field name="inherit_id" ref="l10n_it_fatturapa.view_account_config_settings"/>
<field name="arch" type="xml">
<xpath expr="//div[@id='fatturapa_settings']" position="inside">
<div>
<label for="e_invoice_user_id"/>
<field name="e_invoice_user_id" class="oe_inline"/>
</div>
</xpath>
</field>
</record>
</data>
</openerp>