The Squirrel POS Punchh Logs will be held by default in the following path:
C:\Program Files (x86)\Punchh\Bin\Log
The Punchh installation location will prefix the Log directory. As such, if the Punchh installation was completed elsewhere, this file path may differ.
The logs names begin with the date, for example log 2015-0311-000020.log corresponds to March 11, 2015. You may be asked to provide logs to Punchh in case there are any issues with your integration integration.