I installed todoist on my nextbook tablet. How do I bring up so I can enter to do items
I assume you are referring to one of these tablets. http://nextbookusa.com/
If that is the case, and you have installed our Todoist app from the Google Play Store, you should be able to just click on the Todoist Icon on the desktop/wallpaper area, or in the All Apps area of the device. This should bring you into Todoist, all you'd need to do is log into your account.