diff --git a/connect/models/schemas.py b/connect/models/schemas.py
index af2d59c..3d20f55 100644
--- a/connect/models/schemas.py
+++ b/connect/models/schemas.py
@@ -502,7 +502,7 @@ def make_object(self, data):
 class TierAccountsSchema(Schema):
     customer = fields.Nested(TierAccountSchema)
     tier1 = fields.Nested(TierAccountSchema)
-    tier2 = fields.Nested(TierAccountSchema)
+    tier2 = fields.Nested(TierAccountSchema, allow_none=True)
 
     @post_load
     def make_object(self, data):
diff --git a/connect/models/tier_accounts.py b/connect/models/tier_accounts.py
index bca21e6..5a8486a 100644
--- a/connect/models/tier_accounts.py
+++ b/connect/models/tier_accounts.py
@@ -3,6 +3,8 @@
 # This file is part of the Ingram Micro Cloud Blue Connect SDK.
 # Copyright (c) 2019 Ingram Micro. All Rights Reserved.
 
+from typing import Optional
+
 from .base import BaseModel
 from .tier_account import TierAccount
 from .schemas import TierAccountsSchema
@@ -19,5 +21,5 @@ class TierAccounts(BaseModel):
     tier1 = None  # type: TierAccount
     """ (:py:class:`.TierAccount`) Level 1 TierAccount Object. """
 
-    tier2 = None  # type: TierAccount
-    """ (:py:class:`.TierAccount`) Level 2 TierAccount Object. """
+    tier2 = None  # type: Optional[TierAccount]
+    """ (:py:class:`.TierAccount` | None) Level 2 TierAccount Object. """
diff --git a/connect/resources/tier_config_automation.py b/connect/resources/tier_config_automation.py
index d382f2d..9e26a4c 100644
--- a/connect/resources/tier_config_automation.py
+++ b/connect/resources/tier_config_automation.py
@@ -36,6 +36,31 @@ class TierConfigAutomation(AutomationEngine):
     resource = 'tier/config-requests'
     model_class = TierConfigRequest
 
+    def filters(self, status='pending', **kwargs):
+        """ Returns the default set of filters for Tier Config request, plus any others that you
+        might specify. The allowed filters are:
+
+        - type
+        - status
+        - id
+        - configuration__id
+        - configuration__tier_level
+        - configuration__account__id
+        - configuration__product__id
+        - assignee__id
+        - unassigned (bool)
+        - configuration__account__external_uid
+
+        :param str status: Status of the requests. Default: ``'pending'``.
+        :param dict[str,Any] kwargs: Additional filters to add to the default ones.
+        :return: The set of filters for this resource.
+        :rtype: dict[str,Any]
+        """
+        filters = super(TierConfigAutomation, self).filters(status=status, **kwargs)
+        if self.config.products:
+            filters['configuration__product__id'] = ','.join(self.config.products)
+        return filters
+
     @function_log
     def dispatch(self, request):
         # type: (TierConfigRequest) -> str