diff --git a/l10n_ar_ux/__manifest__.py b/l10n_ar_ux/__manifest__.py
index dba9da2a3..c751a40ab 100644
--- a/l10n_ar_ux/__manifest__.py
+++ b/l10n_ar_ux/__manifest__.py
@@ -1,6 +1,6 @@
 {
     'name': 'Argentinian Accounting UX',
-    'version': "17.0.1.3.0",
+    'version': "17.0.1.4.0",
     'category': 'Localization/Argentina',
     'sequence': 14,
     'author': 'ADHOC SA',
diff --git a/l10n_ar_ux/controllers/portal.py b/l10n_ar_ux/controllers/portal.py
index 1f725b4b8..d3974c942 100644
--- a/l10n_ar_ux/controllers/portal.py
+++ b/l10n_ar_ux/controllers/portal.py
@@ -32,6 +32,19 @@ def details_form_validate(self, data):
             error_message.extend(write_message)
         return error, error_message
 
+    def values_preprocess_ar(self, values):
+        """ We preprocess the ar-post data to ensure the correct assignment of many2one fields."""
+        new_values = dict()
+        partner_fields = request.env['res.partner']._fields
+        ar_camp = ['l10n_ar_afip_responsibility_type_id', 'l10n_latam_identification_type_id', 'commercial_partner_id']
+
+        for k, v in values.items():
+            # Convert the values for many2one fields to integer since they are used as IDs
+            if k in partner_fields and k in ar_camp and partner_fields[k].type == 'many2one':
+                new_values[k] = bool(v) and int(v) or False
+
+        return new_values
+
     @route()
     def account(self, redirect=None, **post):
         partner = request.env.user.partner_id
@@ -39,11 +52,8 @@ def account(self, redirect=None, **post):
             if not partner.can_edit_vat():
                 post['country_id'] = str(partner.country_id.id)
             error, _error_message = self.details_form_validate(post)
-            if not error:
-                post.pop('commercial_partner_id', False)
-                post.pop('vat', False)
-                post.pop('l10n_latam_identification_type_id', False)
-                post.pop('l10n_ar_afip_responsibility_type_id', False)
+            #Procesamos los datos del post para asignar correctamente los valores de los campos many2one
+            post.update(self.values_preprocess_ar(post))
 
         response = super().account(redirect=redirect, **post)
         identification_types = request.env['l10n_latam.identification.type'].sudo().search([])
@@ -52,7 +62,10 @@ def account(self, redirect=None, **post):
         partner = request.env['res.users'].browse(uid).partner_id if uid else request.env['res.partner']
         partner = partner.with_context(show_address=1).sudo()
         response.qcontext.update({
+            'afip_respo_type': post.get('l10n_ar_afip_responsibility_type_id') or partner.l10n_ar_afip_responsibility_type_id.id,
+            'latam_ident_type': post.get('l10n_latam_identification_type_id') or partner.l10n_latam_identification_type_id.id,
             'identification_types': identification_types,
             'afip_responsibilities': afip_responsibilities,
-            'partner': partner})
+            'partner': partner,
+            'partner_can_edit_vat': partner.can_edit_vat()})
         return response
diff --git a/l10n_ar_ux/views/portal_templates.xml b/l10n_ar_ux/views/portal_templates.xml
index b9c52b57a..d091bc90e 100644
--- a/l10n_ar_ux/views/portal_templates.xml
+++ b/l10n_ar_ux/views/portal_templates.xml
@@ -19,7 +19,7 @@
                 <label class="control-label" for="l10n_latam_identification_type_id">Document Type</label>
                 <input name="commercial_partner_id" class="form-control" t-att-value="partner.commercial_partner_id.id" type='hidden'/>
                 <t t-set="document_type" t-value="partner.commercial_partner_id.l10n_latam_identification_type_id"/>
-                <t t-if="document_type">
+                <t t-if="not partner_can_edit_vat">
                     <p class="form-control" t-out="document_type.name" readonly="1" title="Changing your document type is not allowed. Please contact us directly for this operation."/>
                     <input name="l10n_latam_identification_type_id" class="form-control" t-att-value="document_type.id" type='hidden'/>
                 </t>
@@ -27,7 +27,7 @@
                     <select name="l10n_latam_identification_type_id" class="form-control">
                         <option value="">Document Type...</option>
                         <t t-foreach="identification_types or []" t-as="document_identification">
-                            <option t-att-value="document_identification.id" t-att-selected="str(document_identification.id) == l10n_latam_identification_type_id">
+                            <option t-att-value="document_identification.id" t-att-selected="document_identification.id == latam_ident_type">
                                 <t t-out="document_identification.name"/>
                             </option>
                         </t>
@@ -38,14 +38,14 @@
             <!-- Add document number -->
             <div t-attf-class="form-group #{error.get('vat') and 'o_has_error' or ''} col-xl-6">
                 <label class="col-form-label" for="vat">Document Number</label>
-                <input type="text" name="vat" t-attf-class="form-control #{error.get('vat') and 'is-invalid' or ''}" t-att-value="partner.commercial_partner_id.vat or vat" t-att-readonly="'1' if partner.commercial_partner_id.vat else None" t-att-title="'Changing your document number is not allowed. Please contact us directly for this operation.' if partner.commercial_partner_id.vat else None"/>
+                <input type="text" name="vat" t-attf-class="form-control #{error.get('vat') and 'is-invalid' or ''}" t-att-value="partner.commercial_partner_id.vat or vat" t-att-readonly="'1' if not partner_can_edit_vat else None" t-att-title="'Changing your document number is not allowed. Please contact us directly for this operation.' if partner.commercial_partner_id.vat else None"/>
             </div>
 
             <!-- Add AFIP Responsibility -->
             <div t-attf-class="form-group #{error.get('l10n_ar_afip_responsibility_type_id') and 'has-error' or ''} col-xl-6">
                 <label class="control-label" for="l10n_ar_afip_responsibility_type_id">AFIP Responsibility</label>
                 <t t-set="afip_responsibility" t-value="partner.commercial_partner_id.l10n_ar_afip_responsibility_type_id"/>
-                <t t-if="afip_responsibility">
+                <t t-if="not partner_can_edit_vat">
                     <p class="form-control" t-out="afip_responsibility.name" readonly="1" title="Changing your document type is not allowed. Please contact us directly for this operation."/>
                     <input name="l10n_ar_afip_responsibility_type_id" class="form-control" t-att-value="afip_responsibility.id" type='hidden'/>
                 </t>
@@ -53,7 +53,7 @@
                     <select name="l10n_ar_afip_responsibility_type_id" class="form-control">
                         <option value="">AFIP Responsibility...</option>
                         <t t-foreach="afip_responsibilities or []" t-as="afip_res">
-                            <option t-att-value="afip_res.id" t-att-selected="str(afip_res.id) == l10n_ar_afip_responsibility_type_id">
+                            <option t-att-value="afip_res.id" t-att-selected="afip_res.id == afip_respo_type">
                                 <t t-out="afip_res.name"/>
                             </option>
                         </t>