Hi Fiona, yes you can do this. Try opening the payrun that you want to edit, Select payrun actions, unlock, (leave a comment about why you are reopening, if you like), make edits, and finalise the payrun again. Is that helpful?
This would be great advice if you started with how to actually find an existing payrun in Quickbooks. You can't search for it in the Search option. It's not in the menu. The only option is to add a payrun. Can you direct me to how to find an existing payrun?