I was excited to find your input on how to mark multiple "billable" transactions as  not billable.  However, I was unable to follow your instructions.  I called tech support who told me I would have to change this one transaction at a time (as they previously had told me) so I referenced them to your solution which we tried to follow together.... but again we were unable to lock the code.  It appears some things may have changed within QBO since your original post.  I have about 16 years worth of transactions that are marked billable.  When I migrated over from desktop in January of this year all customers and vendors and accounts which I had previously made inactive became active as a result.  Is there still a way mark multiple transactions as NOT billable?  Thanks in advance!