Hi, sorry if this is looks simple. Is there a way to remove the edit button on the transaction page (JE for this instance) using only a workflow?

You should be able to adjust it in the permissions. https://jcurvesolutions1.zendesk.com/hc/en-us/articles/360029566251-Journal-Entry-Permission-Levels-detailed-explanation?mobile_site=false

This could work, thanks!

Alternatively - you can use the "lock record" action