If you do not have the ellipsis available to unpost a revaluation and can only see the revaluation button, you may not have the necessary permissions and this will need to be added to your user.
 
The permissions needed to allow the ability to unpost or make corrections to a revaluation are
Revaluation: Correction Posting Attribute and Revaluation: Correction Unpost.
 
Once those have been added and your session reloaded, you should now have the ability to unpost and make corrections to a posted revaluation.


If you do not have access to change your own permissions, this will need to be done by your own company internal iplicit system admin