I struggle with getting classes appropriately assigned as well  I own 13 rental properties, each of which are assigned a class.  Each is an individual income unit, and the repairs, utilities, etc. are crucial in reviewing each bottom line.  I'd appreciate knowing the step by step process to most efficiently attaching the class to each transaction (bookkeeping is not my field of expertise).  If it is slow and cumbersome, so be it.  But it is critical to my business.  Thanks!