Hunt for the munzee, then Capture it.
The next screen asks you if you would like to "rate this munzee". Choose Not Now.
Tap the Hunt button and view the map.
If you are a Premium Member, tap the Apply Filter button and toggle off the Hide captured munzees option
Your captured munzee should now appear in red on the screen.
Tap the grey bubble to bring up the details
Click the Journal button
Click the + sign.
The default option is General Comment. Leave your comment and submit.
Instead of General Comment you can choose Needs Repair, Unable to locate or I found it!. Do not choose "I found it", you have already recorded your find. If you choose "I found it" you will have to rate the munzee.