A sample code is pasted here. You can refer the below code.

def move_line_get(self, cr, uid, invoice_id):
        res = []
        cr.execute('SELECT * FROM account_invoice_tax WHERE invoice_id=%s', (invoice_id,))
        for t in cr.dictfetchall():
            if not t['amount'] \
                    and not t['tax_code_id'] \
                    and not t['tax_amount']:
                continue
            res.append({
                'type':'tax',
                'name':t['name'],
                'price_unit': t['amount'],
                'quantity': 1,
                'price': t['amount'] or 0.0,
                'account_id': t['account_id'],
                'tax_code_id': t['tax_code_id'],
                'tax_amount': t['tax_amount'],
                'account_analytic_id': t['account_analytic_id'],
            })
        return res