Use of tag um and uhm

Hi there,
I am new here and just started transcribing.
I have an issue understanding the use of the dutch um and uhm. Sometimes people use uhm or um as a filler word and sometimes to think. I see the pre-transcribed text using the filler word um as a thinking tag and it confuses me. Do I need to put the um thinking tag for all the ums and uhms that I hear or can I transcribe as I see fit because only a Dutch person would know the real difference? Hope my question is clear.

You can use one of these tags as appropriate:

  • uh – Question or confusion expression
  • um – The speaker is thinking