How do you report hours that vary week to week? after 9 years as a line cook

I work some days through a staffing agency while still certifying. The form asks for gross earnings, which I do not see until later. Did anyone get an overpayment notice from a mistake?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

Report honestly and keep your stubs. An honest small error is much easier to fix than a missing report.