diff --git a/document.py b/document.py
index 8767cd9..cd3b854 100644
--- a/document.py
+++ b/document.py
@@ -733,9 +733,14 @@ class Incoming(metaclass=PoolMeta):
         line_taxes = line_data.pop('taxes', [])
         for x in line_taxes:
             percent = x.get('percent', None)
-            if (x.get('type', '') == 'VAT') and (percent is not None):
-                percent = percent / Decimal('100')
-                tax_and_category.append(get_tax_by_percent(percent))
+            if cfg1 and cfg1.accept_incomplete_tax:
+                if percent is not None:
+                    percent = percent / Decimal('100')
+                    tax_and_category.append(get_tax_by_percent(percent))
+            else:
+                if (x.get('type', '') == 'VAT') and (percent is not None):
+                    percent = percent / Decimal('100')
+                    tax_and_category.append(get_tax_by_percent(percent))
 
         # check result
         if len(line_taxes) != len(tax_and_category):