Patrick Roth explains some of the changes in Import and Export for Office in GP 2013, especially around budgets.
Import and Export for Office in GP 2013 – Developing for Dynamics GP – Site Home – MSDN Blogs
Development & IntegrationMicrosoft & the GP EcosystemGP 2013
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.