Q: how do you delete a reminder tab

Hello otten1949,

Welcome to Apple Support Communities! It looks like you're needing some help deleting a reminder list from your iPhone. 

To delete a reminder list, use the following steps:

Delete a list

When you delete a reminder list, all the reminders it contains are also deleted. You can’t delete your last reminder list because you must always have at least one list for active (not completed) reminders. 

WARNING:    When you delete a reminder list, the list is deleted on every device where you turned on iCloud Reminders. For example, if you have iCloud Reminders turned on on your iPhone, when you delete a reminder list from iCloud Reminders on the web, the reminder list is also deleted from the Reminders app on your iPhone. 

1. Select the reminder list you want to delete.

2. Press the Delete or Backspace key.

If you accidentally deleted iCloud reminder lists, you can use iCloud.com to restore them, together with your calendars and events, from an earlier version that was automatically archived in iCloud. For instructions, see Restore your contacts, calendars and reminders, or bookmarks.

iCloud: Add and delete reminder lists

In addition to deleting reminder lists, you can also delete single reminders from within a list. Those steps can be found in the following support article: 

iCloud: Create, edit, and delete reminders

Thanks for using Apple Support Communities.

Have an awesome day!