diff --git a/smartsheet/home.py b/smartsheet/home.py
index 4881253..deac61b 100644
--- a/smartsheet/home.py
+++ b/smartsheet/home.py
@@ -101,7 +101,7 @@ def create_sheet_from_template(self, sheet_obj, include=None):
             sheet_obj (Sheet): Sheet object.
             include (list[str]): A list of optional elements
                 to include from the source Template. Valid list values:
-                data, attachments, discussions, cellLinks, forms.
+                attachments, cellLinks, data, discussions, forms, rules and ruleRecipients.
 
         Returns:
             Result
diff --git a/smartsheet/models/column.py b/smartsheet/models/column.py
index 8f150d0..e89c4a9 100644
--- a/smartsheet/models/column.py
+++ b/smartsheet/models/column.py
@@ -39,6 +39,7 @@ def __init__(self, props=None, base_obj=None):
         self._contact_options = TypedList(Contact)
         self._description = String()
         self._format_ = String()
+        self._formula = String()
         self._hidden = Boolean()
         self._id_ = Number()
         self._index = Number()
@@ -114,6 +115,14 @@ def format_(self):
     def format_(self, value):
         self._format_.value = value
 
+    @property
+    def formula(self):
+        return self._formula.value
+
+    @formula.setter
+    def formula(self, value):
+        self._formula.value = value
+
     @property
     def hidden(self):
         return self._hidden.value
diff --git a/smartsheet/sheets.py b/smartsheet/sheets.py
index 6d7541f..0d0e67e 100644
--- a/smartsheet/sheets.py
+++ b/smartsheet/sheets.py
@@ -470,7 +470,9 @@ def get_share(self, sheet_id, share_id):
         return response
 
     def get_sheet(self, sheet_id, include=None, exclude=None, row_ids=None,
-                  row_numbers=None, column_ids=None, page_size=None, page=None, if_version_after=None, level=None):
+                  row_numbers=None, column_ids=None, page_size=None, page=None,
+                  if_version_after=None, level=None, rows_modified_since=None,
+                  filter_id=None):
         """Get the specified Sheet.
 
         Get the specified Sheet. Returns the Sheet, including Rows,
@@ -500,6 +502,9 @@ def get_sheet(self, sheet_id, include=None, exclude=None, row_ids=None,
             page (int): Which page to return.
             if_version_after (int): only fetch Sheet if more recent version
                 available.
+            rows_modified_since: Date should be in ISO-8601 format, for example, rowsModifiedSince=2020-01-30T13:25:32-07:00.
+            filter_id (int): Applies the given filter (if accessible by the calling user)
+                and marks the affected rows as "filteredOut": true
 
         Returns:
             Sheet
@@ -516,6 +521,8 @@ def get_sheet(self, sheet_id, include=None, exclude=None, row_ids=None,
         _op['query_params']['page'] = page
         _op['query_params']['ifVersionAfter'] = if_version_after
         _op['query_params']['level'] = level
+        _op['query_params']['rowsModifiedSince'] = rows_modified_since
+        _op['query_params']['filterId'] = filter_id
 
         expected = 'Sheet'
         prepped_request = self._base.prepare_request(_op)
diff --git a/tests/integration/test_columns.py b/tests/integration/test_columns.py
index fe7e701..f0a62ff 100644
--- a/tests/integration/test_columns.py
+++ b/tests/integration/test_columns.py
@@ -71,3 +71,21 @@ def test_delete_column(self, smart_setup):
             col.id
         )
         assert action.message == 'SUCCESS'
+
+    def test_column_formulas(self, smart_setup):
+        smart = smart_setup['smart']
+        action = smart_setup['sheet'].add_columns({
+            'title': 'Column Formula',
+            'type': 'DATE',
+            'index': 1,
+            'formula': '=TODAY()'
+        })
+        cols = action.result
+        assert action.message == 'SUCCESS'
+        assert cols[0].formula is not None
+
+        action = smart.Sheets.update_column(smart_setup['sheet'].id, cols[0].id,
+                                            {'formula': ''})
+        col = action.result
+        assert action.message == 'SUCCESS'
+        assert col.formula is None