Fix

.~lock.folio.fodt#

@@ -1 +0,0 @@
-,psk,Tech,25.11.2021 20:56,file:///home/psk/.config/libreoffice/4;

.~lock.registration_card.fodt#

@@ -1 +0,0 @@
-,psk,Tech,25.11.2021 20:47,file:///home/psk/.config/libreoffice/4;

.~lock.service.fods#

@@ -1 +0,0 @@
-,psk,Tech,25.11.2021 20:57,file:///home/psk/.config/libreoffice/4;

booking.py

@@ -549,6 +549,7 @@ class Booking(Workflow, ModelSQL, ModelView):
                         'invoice_line': line.id,
                     })
             invoice.save()
+            invoice.update_taxes([invoice])
 
     @classmethod
     def _get_new_invoice(cls, data):

view/create_guest_form.xml

@@ -12,6 +12,8 @@ this repository contains the full copyright notices and license terms. -->
     <field name="birthday"/>
     <label name="sex"/>
     <field name="sex"/>
+    <label name="nationality"/>
+    <field name="nationality"/>
     <group colspan="6" col="8" id="names">
         <separator string="Names" colspan="4" id="names"/>
         <newline/>