Greetings firegirl,
Welcome to the Apple Support Communities!
It sounds like you are receiving a message that your iCloud storage is almost full and you would like to delete some documents to free up space. To do this, use the instruction given in the attached article to navigate to your documents. The article also explains other ways of freeing up space on your iCloud account as well.
Manage your iCloud storage - Apple Support
- On your iPhone, iPad, or iPod touch:
- If you're using iOS 8 or later, tap Settings > iCloud > Storage > Manage Storage.
- If you're using an earlier version of iOS, tap Settings > iCloud > Storage & Backup.
- On your Mac, go to Apple menu > System Preferences, click iCloud, then click Manage.
- On your PC, open iCloud for Windows, then click Manage.
Before you delete anything, you might want to archive or make copies of your iCloud data.
If using your iPhone, once you navigate to the documents in iCloud that you would like to delete, you can swipe to delete them.
Cheers,
Joe