If your accounting plan
(Chapter 2) calls for classes, class tracking
must be turned on. In QuickBooks 4 and
earlier, this is done by clicking (in the
menu bar) Preferences,
then, in the menu, Transactions.
In that window, check
Use class tracking. Note that
Transactions is below the
dividing line, meaning that the selection is
local to the company file currently
loaded. In QuickBooks 5, click File
then Preferences and select
Accounting to find make this choice.