In a great new post, Mariano Gomez looks at Creating Branching Logic Fields in Report Writer. He’s also right that sometimes Report Writer is the right solution. I had a client that needed one custom report. It simply wasn’t worth the effort to spin up Crystal or SSRS for one report so I wrote it in Report Writer.
Creating Branching Logic Fields in Report Writer
Archived post from 2010. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.