How do I get tasks that are completed to show back up in the completed folder?

[lveyon5]

Before I edited the workflow, I had issues completed that showed up.  I edited the workflow and went back to the board, and all issues that were completed no longer show up. I can go into issues and search completed issues I can see them, but I also want to be able to see them on the board.

[__ Jimi Wikman]

If you go to board settings, is the closed status still mapped to a column?

[Nic Brough -Adaptavist-]

Welcome to the Atlassian Community!

What do you mean by "folder"?  Jira doesn't have such a concept, so I don't understand the question.