Can’t Use Check Button in Notes

Hello J_007,

After reviewing your post, it sounds like the Notes app is not working as expected. There are a couple things you can try that may be able to help. I would recommend you read these articles and use them to help troubleshoot the issue.

Update your iPhone, iPad, or iPod touch

"Delete a built-in app from your device

1. On your iOS or iPadOS device, touch and hold the app.
2. Tap Rearrange Apps.
3. Tap  in the upper-left corner to delete the app.
4. Tap Delete. Then on an iPhone X or later, tap Done. Or on an iPhone 8 or earlier, press the Home button.

If you have an Apple Watch, deleting an app from your iPhone also deletes that app from your Apple Watch.

Restore a built-in app that you deleted

1. On your iOS or iPadOS device, go to the App Store.
2. Search for the app. Make sure that you use the exact name of the app. Find the correct name of built-in apps.
3. Tap  to restore the app.
4. Wait for the app to restore, then open it from your Home screen.

If you have an Apple Watch, restoring an app to your iPhone also restores that app to your Apple Watch."

Delete built-in Apple apps on your iOS 12, iOS 13, or iPadOS device or Apple Watch

Please don't hesitate to let us know if the steps resolved your issue or if you need additional assistance.

Thank you for using Apple Support Communities. Have a nice day.