diff --git a/modules/account/tax.py b/modules/account/tax.py
index 8502f8e053..d5d9b67eb3 100644
--- a/modules/account/tax.py
+++ b/modules/account/tax.py
@@ -1231,6 +1231,7 @@ class TaxableMixin(object):
         return []
 
     @property
+    @fields.depends('company')
     def tax_date(self):
         "Date to use when computing the tax"
         pool = Pool()
@@ -1241,6 +1242,7 @@ class TaxableMixin(object):
     def _get_tax_context(self):
         return {}
 
+    @fields.depends('currency')
     def _compute_tax_line(self, amount, base, tax):
         if base >= 0:
             type_ = 'invoice'
@@ -1280,7 +1282,9 @@ class TaxableMixin(object):
                     if abs(remainder) < self.currency.rounding:
                         break
 
-    @fields.depends('company', methods=['_get_tax_context', '_round_taxes'])
+    @fields.depends('company', methods=[
+            'taxable_lines', 'tax_date', '_get_tax_context',
+            '_compute_tax_line', '_round_taxes'])
     def _get_taxes(self):
         pool = Pool()
         Tax = pool.get('account.tax')
diff --git a/modules/account_invoice/invoice.py b/modules/account_invoice/invoice.py
index 00673e342b..e4c3251ade 100644
--- a/modules/account_invoice/invoice.py
+++ b/modules/account_invoice/invoice.py
@@ -1154,6 +1154,7 @@ class Invoice(
         return result
 
     @property
+    @fields.depends('lines', 'type')
     def taxable_lines(self):
         taxable_lines = []
         for line in self.lines:
@@ -2718,20 +2719,21 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
         return 1
 
     @property
+    @fields.depends(
+        'invoice', '_parent_invoice.type', 'invoice_type',
+        'taxes_deductible_rate', 'taxes', 'unit_price', 'quantity',
+        methods=['tax_date'])
     def taxable_lines(self):
-        # In case we're called from an on_change we have to use some sensible
-        # defaults
         context = Transaction().context
-        if (getattr(self, 'invoice', None)
-                and getattr(self.invoice, 'type', None)):
+        if self.invoice and self.invoice.type:
             invoice_type = self.invoice.type
         else:
-            invoice_type = getattr(self, 'invoice_type', None)
+            invoice_type = self.invoice_type
         if invoice_type == 'in':
             if context.get('_deductible_rate') is not None:
                 deductible_rate = context['_deductible_rate']
             else:
-                deductible_rate = getattr(self, 'taxes_deductible_rate', 1)
+                deductible_rate = self.taxes_deductible_rate
             if deductible_rate is None:
                 deductible_rate = 1
             if not deductible_rate:
@@ -2739,14 +2741,14 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
         else:
             deductible_rate = 1
         return [(
-                list(getattr(self, 'taxes', None)) or [],
-                ((getattr(self, 'unit_price', None) or Decimal(0))
-                    * deductible_rate),
-                getattr(self, 'quantity', None) or 0,
-                getattr(self, 'tax_date', None),
+                list(self.taxes or []),
+                (self.unit_price or Decimal(0)) * deductible_rate,
+                self.quantity or 0,
+                self.tax_date,
                 )]
 
     @property
+    @fields.depends('taxes_date', 'invoice', '_parent_invoice.id')
     def tax_date(self):
         if getattr(self, 'taxes_date', None):
             return self.taxes_date
@@ -2755,6 +2757,7 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
         else:
             return super().tax_date
 
+    @fields.depends('invoice', '_parent_invoice.id', 'company')
     def _get_tax_context(self):
         if self.invoice:
             return self.invoice._get_tax_context()
diff --git a/modules/account_tax_non_deductible/account.py b/modules/account_tax_non_deductible/account.py
index e25f4217eb..6d6e377664 100644
--- a/modules/account_tax_non_deductible/account.py
+++ b/modules/account_tax_non_deductible/account.py
@@ -53,14 +53,14 @@ class InvoiceLine(metaclass=PoolMeta):
         return amount
 
     @property
+    @fields.depends('invoice', '_parent_invoice.type', 'invoice_type')
     def taxable_lines(self):
         context = Transaction().context
         lines = super().taxable_lines
-        if (getattr(self, 'invoice', None)
-                and getattr(self.invoice, 'type', None)):
+        if self.invoice and self.invoice.type:
             invoice_type = self.invoice.type
         else:
-            invoice_type = getattr(self, 'invoice_type', None)
+            invoice_type = self.invoice_type
         if invoice_type == 'in':
             if context.get('_non_deductible'):
                 for line in lines:
diff --git a/modules/purchase/purchase.py b/modules/purchase/purchase.py
index e81b5437d1..80a6a57a82 100644
--- a/modules/purchase/purchase.py
+++ b/modules/purchase/purchase.py
@@ -511,6 +511,7 @@ class Purchase(
             self.total_amount = self.currency.round(self.total_amount)
 
     @property
+    @fields.depends('lines')
     def taxable_lines(self):
         taxable_lines = []
         # In case we're called from an on_change we have to use some sensible
diff --git a/modules/sale/sale.py b/modules/sale/sale.py
index 41aabbff42..7f63d24bb3 100644
--- a/modules/sale/sale.py
+++ b/modules/sale/sale.py
@@ -640,6 +640,7 @@ class Sale(
             self.total_amount = self.currency.round(self.total_amount)
 
     @property
+    @fields.depends('lines')
     def taxable_lines(self):
         taxable_lines = []
         for line in self.lines:
@@ -1683,19 +1684,18 @@ class SaleLine(TaxableMixin, sequence_ordered(), ModelSQL, ModelView):
         return progress
 
     @property
+    @fields.depends('type', 'taxes', 'unit_price', 'quantity')
     def taxable_lines(self):
-        # In case we're called from an on_change
-        # we have to use some sensible defaults
-        if getattr(self, 'type', None) == 'line':
-            return [(
-                    getattr(self, 'taxes', None) or [],
-                    getattr(self, 'unit_price', None) or Decimal(0),
-                    getattr(self, 'quantity', None) or 0,
+        if self.type == 'line':
+            return [(self.taxes or [],
+                    self.unit_price or Decimal(0),
+                    self.quantity or 0,
                     None,
                     )]
         else:
             return []
 
+    @fields.depends('sale', '_parent_sale.id')
     def _get_tax_context(self):
         return self.sale._get_tax_context()
 
diff --git a/modules/sale_point/sale.py b/modules/sale_point/sale.py
index 8ad30fde1e..880c541762 100644
--- a/modules/sale_point/sale.py
+++ b/modules/sale_point/sale.py
@@ -441,10 +441,12 @@ class POSSale(Workflow, ModelSQL, ModelView, TaxableMixin, ChatMixin):
         return lines
 
     @property
+    @fields.depends('lines')
     def taxable_lines(self):
         return sum((line.taxable_lines for line in self.lines), [])
 
     @property
+    @fields.depends('date')
     def tax_date(self):
         return self.date or super().tax_date
 
@@ -706,6 +708,8 @@ class POSSaleLine(ModelSQL, ModelView, TaxableMixin):
             return Product(self.product).customer_taxes_used
 
     @property
+    @fields.depends(
+        'taxes', 'unit_list_price', 'quantity', methods=['tax_date'])
     def taxable_lines(self):
         return [
             (self.taxes, self.unit_list_price, self.quantity, self.tax_date)]
@@ -718,6 +722,7 @@ class POSSaleLine(ModelSQL, ModelView, TaxableMixin):
             return 'credit_note'
 
     @property
+    @fields.depends('sale', '_parent_sale.date')
     def tax_date(self):
         return self.sale.date or super().tax_date
 
diff --git a/modules/sale_promotion/sale.py b/modules/sale_promotion/sale.py
index c1058926ba..426131f1bf 100644
--- a/modules/sale_promotion/sale.py
+++ b/modules/sale_promotion/sale.py
@@ -161,16 +161,16 @@ class Line(metaclass=PoolMeta):
             return amount
 
     @property
+    @fields.depends(
+        'type', 'taxes', 'original_unit_price', 'unit_price', 'quantity')
     def taxable_lines(self):
         lines = super().taxable_lines
-        if (getattr(self, 'type', None) == 'line'
+        if (self.type == 'line'
                 and Transaction().context.get('_original_amount')):
             lines = [(
-                    getattr(self, 'taxes', None) or [],
-                    getattr(self, 'original_unit_price', None)
-                    or getattr(self, 'unit_price', None)
-                    or Decimal(0),
-                    getattr(self, 'quantity', None) or 0,
+                    self.taxes or [],
+                    self.original_unit_price or self.unit_price or Decimal(0),
+                    self.quantity or 0,
                     None,
                     )]
         return lines
diff --git a/modules/sale_rental/sale.py b/modules/sale_rental/sale.py
index 3d23305cbc..0cc9712679 100644
--- a/modules/sale_rental/sale.py
+++ b/modules/sale_rental/sale.py
@@ -439,6 +439,7 @@ class Rental(
             (t.amount for t in self._get_taxes().values()), Decimal(0))
 
     @property
+    @fields.depends('lines')
     def taxable_lines(self):
         taxable_lines = []
         for line in self.lines:
@@ -1063,17 +1064,16 @@ class RentalLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
         return {}
 
     @property
+    @fields.depends('taxes', 'unit_price', 'quantity', 'duration_unit')
     def taxable_lines(self):
-        # In case we're called from an on_change
-        # we have to use some sensible defaults
         return [(
-                getattr(self, 'taxes', None) or [],
-                getattr(self, 'unit_price', None) or Decimal(0),
-                (getattr(self, 'quantity', None) or 0)
-                * (getattr(self, 'duration_unit', None) or 0),
+                self.taxes or [],
+                self.unit_price or Decimal(0),
+                (self.quantity or 0) * (self.duration_unit or 0),
                 None,
                 )]
 
+    @fields.depends('rental', '_parent_rental.id')
     def _get_tax_context(self):
         return self.rental._get_tax_context()