There are a few different ways that you can check your IBM MDM version.
One way is to check the version in the IBM Installation Manager. To do this, launch the Installation Manager, then select the installation type as "Installation Manager Repository". In the "View Installed Packages" section, select the "All Packages" tab. Find the entry for "Tivoli MDM Server" and note the "Version" column.
Another way is to check the version in the IBM WebSphere Console. To do this, log in to the WebSphere Console and select "System Administration" > "Deployment Manager" > "Application Servers". Select the server that is running your MDM instance, then click the "Runtime" tab. In the "Server Infrastructure" section, select "WebSphere applications". This will list all the deployed applications on the server, including the MDM application. The version number will be listed in the "Version" column.
Finally, you can also check the version by looking at the file "mdmversion.xml" in your MDM installation directory. The version number is listed in the "<version>" element.