Making an Accountant's Copy (QuickBooks 2007+)
QuickBooks 2007 introduced a new system for exchanging data. Everything you need to know is in here.

Making an Accountant's Copy (QuickBooks 2006)
Instructions for clients using QuckBooks 2006 or earlier versions.

When the Accountant's Changes won't import
Dealing with the dreaded "You are attempting to import data from a different Accountant's Copy" error message (for QuickBooks 2006 and earlier versions only).