Hey Crystal! There will be two places where you'd need to check your notifications:
1. Open up your phone's settings:
-Tap on "Apps" or "Application Manager"
- Scroll through the alphabetical list to find "TextNow"
-Ensure that the necessary permissions/notifications are enabled for it
2. Open up your TextNow app:
-Tap on the top left parallel bars to open up your app's menu
-Tap on the gear icon on the top right to open up your settings
-Tap on "Notifications"- set your messaging notifications there.
-Tap on "Calling"- set your desired ringtone for incoming calls.