Personally, everything I ever wanted to know about SUTA is a way shorter list than what I needed to know.
Everything and Anything you wanted to know about SUTA in Microsoft Dynamics GP! – Microsoft Dynamics GP Community
Payroll & HRMicrosoft & the GP Ecosystem
Archived post from 2017. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.