My calendar will not let me add an event and will not sync with my iPhone calendar. I also do not get all messages on my ipad

Hi Missjawja,

Thanks for using Apple Support Communities. We understand you have some questions about your iPad calendar and messages. We're happy to help. If your events are not syncing as expected, work through the steps below to help resolve calendar sync issues:

1. Make sure both devices are signed into the same Apple ID
2. Work through the steps to resolve calendar sync issues here: If your iCloud Contacts, Calendars, or Reminders won’t sync - Apple Support

You mentioned all your messages are not appearing on your iPad as well. Check out the steps below to resolve iMessage issues:

1. Make sure iMessage is set up correctly: Set up Messages on iPad - Apple Support
2. If you are not getting text/SMS (green) messages on your iPad, make sure you've set up SMS/MMS text message forwarding: Forward SMS/MMS text messages from your iPhone to your Mac or iPad - Apple Support

Thanks.