More year end info for GP including: Electronic W-2 (EFW2) for a successful filing!!!
Electronic W-2 (EFW2) for a successful filing!!! – Microsoft Dynamics GP Community
Year-End & 1099Payroll & HRMicrosoft & the GP Ecosystem
Archived post from 2016. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.