This release contains a number of improvements for quickbooks integration

• Optionally synchronize freight component of invoice onto synced bills
• Ability to Optionally set tax code used for stock and freight line items
• When mapping a new supplier for the first time preset expense/freight/accounts payable and tax codes

Note that c9 nows connects into Quickbooks in a slightly different way so you'll be forced to reauthorise c9 to access quickbooks after upgrading.