I currently have a spread sheet that I use to track our return shipipng tags. I have been asked to provide a report that details the items and quantites being returned by month. When i attempt to group the DATE SENT data in the pivot table i get the "CANNOT GROUP THAT SECTION" error. I have reformatted the column and filled in any blank cells and still get this error. Please let me know what I am doing wrong. Thanks in advance.