If you aren't able to use a computer to post scores at your event you can do it from your phone or any mobile device.
Go to http://tourneymachine.com on your phone, and tap Manage Tournaments
Enter your Tourney Machine username and password
Tap on the tournament that you're posting scores for
Now you can post scores by Division or Complex
NOTE: You can create user that just have permission to post scores. When you logged into Tourney Machine go to the top and click on Admin>users>then create a username, password and assign the the role.