diff --git a/intrastat_base/models/intrastat_common.py b/intrastat_base/models/intrastat_common.py
index d18acee..3d44b7c 100644
--- a/intrastat_base/models/intrastat_common.py
+++ b/intrastat_base/models/intrastat_common.py
@@ -35,7 +35,7 @@ class IntrastatCommon(models.AbstractModel):
     @api.one
     @api.depends('declaration_line_ids.amount_company_currency')
     def _compute_numbers(self):
-        total_amount = 0.0
+        total_amount = 0  # it is an integer
         num_lines = 0
         for line in self.declaration_line_ids:
             total_amount += line.amount_company_currency
diff --git a/intrastat_product/models/intrastat_product_declaration.py b/intrastat_product/models/intrastat_product_declaration.py
index ce2ad62..66dd7bd 100644
--- a/intrastat_product/models/intrastat_product_declaration.py
+++ b/intrastat_product/models/intrastat_product_declaration.py
@@ -158,9 +158,8 @@ class IntrastatProductDeclaration(models.Model):
     num_decl_lines = fields.Integer(
         compute='_compute_numbers', string='Number of Declaration Lines',
         store=True, track_visibility='onchange')
-    total_amount = fields.Float(
-        compute='_compute_numbers', digits=dp.get_precision('Account'),
-        string='Total Fiscal Amount', store=True,
+    total_amount = fields.Integer(
+        compute='_compute_numbers', string='Total Fiscal Amount', store=True,
         help="Total fiscal amount in company currency of the declaration.")
     currency_id = fields.Many2one(
         'res.currency', related='company_id.currency_id', readonly=True,
diff --git a/intrastat_product/views/intrastat_product_declaration.xml b/intrastat_product/views/intrastat_product_declaration.xml
index 52e0693..6805b58 100644
--- a/intrastat_product/views/intrastat_product_declaration.xml
+++ b/intrastat_product/views/intrastat_product_declaration.xml
@@ -188,6 +188,8 @@
           <field name="suppl_unit_qty"
             attrs="{'invisible': [('intrastat_unit_id', '=', False)], 'required': [('intrastat_unit_id', '!=', False)]}"/>
           <field name="intrastat_unit_id"/>
+          <field name="transport_id"
+            attrs="{'required': [('reporting_level', '=', 'extended')], 'invisible': [('reporting_level', '!=', 'extended')]}"/>
           <field name="region_id" invisible="1"/>
           <field name="product_origin_country_id" invisible="1" string="Product C/O"/>
           <field name="invoice_id"/>