diff --git a/addons/l10n_ca/data/account_tax_data.xml b/addons/l10n_ca/data/account_tax_data.xml
index 803e63c0435..174c30ef360 100644
--- a/addons/l10n_ca/data/account_tax_data.xml
+++ b/addons/l10n_ca/data/account_tax_data.xml
@@ -112,7 +112,7 @@
         <field name="type_tax_use">sale</field>
         <field name="amount">100</field>
         <field name="amount_type">group</field>
-        <field name="children_tax_ids" eval="[(6,0,[ref('pst_bc_sale_en')])]"/>
+        <field name="children_tax_ids" eval="[(6,0,[ref('pst_bc_sale_en'), ref('gstpst_sale_bc_gst_en')])]"/>
         <field name="tag_ids" eval="[(6,0,[ref('tag_gstpst_bc_sale')])]"/>
         <field name="tax_group_id" ref="tax_group_fix"/>
     </record>
diff --git a/addons/point_of_sale/models/pos_order.py b/addons/point_of_sale/models/pos_order.py
index f7089230d69..156000df998 100644
--- a/addons/point_of_sale/models/pos_order.py
+++ b/addons/point_of_sale/models/pos_order.py
@@ -720,7 +720,7 @@ class PosOrder(models.Model):
 
             try:
                 pos_order.action_pos_order_paid()
-            except psycopg2.OperationalError:
+            except psycopg2.DatabaseError:
                 # do not hide transactional errors, the order(s) won't be saved!
                 raise
             except Exception as e:
diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index 60ba6ebc0c8..c6fcebd7a94 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -2658,7 +2658,7 @@ exports.NumpadState = Backbone.Model.extend({
             this.set({
                 buffer: "-" + newChar
             });
-        } else {
+        } else if (!(newChar === '.') || oldBuffer.indexOf('.') === -1) {
             this.set({
                 buffer: (this.get('buffer')) + newChar
             });