Hemlane allows prospective tenants to revise their application, even after it's been submitted. Once an application is back in it's editable mode, the originally submitted application will still be visible by the property manager until the newly edited application is re-submitted.
To edit your application from a prospective tenant's account:
Click the "Edit Application" link on your Dashboard tab
Don't forget to resubmit once you have finished making all your edits!
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