If you want to know which version of HCL Notes including FixPacks, Interim Fixes,… you are using you don’t have to start your HCL Notes Client. Just open a command line windows, change to the installation folder of HCL Notes ( e.g. c:\hcl\notes ) and enter one of the following commands:

nsd -version
C:\HCL\Notes>nsd -version
NSD Version : 12.00.0200.2306 (Release 12.0.2)

or

notes -v c:\temp\notesversion.txt
Then the output is written to the txt file

Link to to entry of the HCL Knowledge base: https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0101159