Can I edit a form up to 5 minutes after click on submit,
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After clicking on submit, you cannot edit a form. You will need to set-up a related action to make changes to what is already saved.
docs.appian.com/.../record-actions.html
Can you explain your use case in more detail?
Conceptually there's not even really such a thing as "edit a form after submit" - i think you need to back it up a bit and describe more plainly what user experience you're hoping to provide.