Can I run a report on the differences between Zenefits and payroll?
Zenefits' payroll sync is a one-way system that pushes changes to payroll. There's currently no way to run a report in Zenefits to determine the differences between Zenefits and payroll. There is more information about available reporting here.
However, those who sync Paylocity using Zenefits' File Sync can download reports from Paylocity and upload them to Zenefits to make a comparison through the Sync Back tool.