I think that you needto be more specific in your question. In this part of the world there is a link available to MYOB in the UK I am aware of a like to Sage accounting and in the US I am aware of Peachtree and Quickbooks. What do you want to achieve by this link, how many users etc.
Paul Buchtmann firstname.lastname@example.org Australia Australia's First ACT Consultant (1989)
FREE Record History to change default to Call or To-Do for ACT! 2010-2012 versions. Custom versions also available.