Hello, I just had this issue recently but I have only been using Balance Sheets by Classes for one client that I took on over a year ago. I have done the same journal entry multiple times and this is the first time I have see the unbalance number at the bottom of my balance sheet. The solution per Quickbooks is to set up a wash account. This seems rediculous to me, you should be able to classify any entry but according to Quickbooks not for Journal entries and a whole list of other transactions. This should be fixed by Quickbooks. I have read other comments saying balance sheet by classes are not reliable.